1. 大蒜含有一些抗氧化物可以抵抗侵入免疫系统的病菌。其中包括与胃溃疡和胃癌有关的幽门杆菌。烹饪技巧：剥皮后，放置15-20分钟，然后再烹饪，这样可以激活提升免疫力的酶类。

1. Garlic contains some antioxidants that can resist bacteria that invade the immune system, including Helicobacter pylori, which is associated with gastric ulcers and stomach cancer. Cooking technique: After peeling, leave it for 15-20 minutes before cooking, which can activate enzymes that enhance immunity.

2. 第二种方法是改变姿势。当我们长时间保持同一姿势时，我们的身体会感到疲劳，也容易犯困。因此，我们可以尝试改变姿势，如调整坐姿或者站起来走动一下。

2. The second method is to change posture. When we maintain the same posture for a long time, our body feels tired and we are more prone to drowsiness. Therefore, we can try to change our posture, such as adjusting our sitting position or getting up to walk around a bit.

3. 上课犯困是很多学生都会遇到的问题，特别是在疲惫的早晨或下午时段。但是，犯困不仅会影响我们的学习效率，还会对我们的身体健康造成负面影响。那么，当我们在上课犯困时，应该怎么办呢？下面，我将为大家介绍一些方法，帮助你们立刻清醒。

3. Feeling sleepy during class is a problem that many students encounter, especially during weary mornings or afternoon sessions. However, being sleepy not only affects our learning efficiency but can also have negative impacts on our physical health. So, what should we do when we feel sleepy during class? Below, I will introduce some methods to help you stay alert immediately.

4. 常晒太阳有助于降低流感病毒及其他常见呼吸道疾病的危害。充足的维生素D还能帮助新陈代谢，减少肥胖风险，而晒太阳是最经济有效地补充方法。

4. Regular sun exposure helps reduce the risks of influenza virus and other common respiratory diseases. Adequate vitamin D also aids metabolism and reduces the risk of obesity, with sun exposure being the most economical and effective method of supplementation.

5. 总之，当我们在上课犯困时，我们可以通过深呼吸、做运动、喝水、集中注意力、改变姿势、听音乐等方法来帮助我们清醒。通过这些方法，我们可以提高学习效率，保持身体健康，让自己更加精力充沛。

5. In summary, when we feel drowsy during class, we can help ourselves stay awake through methods such as deep breathing, exercising, drinking water, focusing our attention, changing our posture, and listening to music. By using these methods, we can enhance our learning efficiency, maintain our physical health, and become more energetic.

6. 第三种方法是听一些轻松的音乐。当我们听到一些轻松的音乐时，我们的身体会放松，情绪也会得更加愉悦，从而帮助我们清醒。

6. The third method is to listen to some light music. When we hear some light music, our body will relax and our mood will become more pleasant, which in turn helps us to stay alert.

7. 第二种方法是做一些简单的运动。这可以帮助我们增加氧气和液流动，提高我们的身体活力。例如，我们可以做一些简单的伸展运动，如头部转动、手臂伸展等。如果条件允许，我们也可以在课间休息时出门走一走，呼吸新鲜空气。

7. The second method is to do some simple exercises. This can help us increase oxygen and fluid circulation, and boost our body's vitality. For example, we can do some simple stretching exercises, such as head turns and arm stretches. If conditions permit, we can also go out for a walk during the break to breathe fresh air.

8. 提高免疫力的首要任务是要多饮开水，这样能使鼻腔和口腔内的黏膜保持湿润；多喝水还能让人感觉清新，充满活力。白开水有助于促进人体的新陈代谢，是很好的催化剂。水很容易被人体吸收，增强身体各器官中的乳酸脱氢酶活力，从而增强人体免疫力和抗病能力。

8. The primary task to enhance immunity is to drink plenty of plain water, which can keep the mucous membranes in the nose and mouth moist; drinking more water can also make people feel fresh and energetic. Plain water helps promote the metabolism of the human body and is a good catalyst. Water is easily absorbed by the human body, enhances the activity of lactic acid dehydrogenase in various organs of the body, thereby enhancing the body's immunity and disease resistance.

9. 熟西瓜同样含有大量功能强大的抗氧化物谷胱甘肽，具有保湿和提神的作用。由于其有助于加强免疫系统的功能，所以可以抗感染。谷胱甘肽位于靠近瓜皮的红壤处。

9. Ripe watermelons also contain a large amount of powerful antioxidant glutathione, which has moisturizing and energizing effects. As it helps to strengthen the function of the immune system, it can resist infections. Glutathione is located in the red soil near the rind of the melon.

10. 除了以上方法外，我们还可以通过调整自己的心态来帮助我们清醒。当我们犯时，我们的注意力往往会分散，导致我们无法集中精力。因此，我们可以尝试集中注意力，关注老师的讲解内容，或者做一些与课程相关的笔记。

10. In addition to the above methods, we can also adjust our mindset to help us stay alert. When we make mistakes, our attention tends to be scattered, preventing us from focusing our energy. Therefore, we can try to concentrate on the teacher's explanations or take some notes related to the course.

11. 最后，我们需要注意的是，犯困不仅会影响我们的学习效率，还会对我们的身体健康造成负面影响。因此，我们应该尽可能避免犯困，保持良好的作息习惯和饮食习惯，以及适当的运动量。

11. Finally, we need to pay attention to the fact that drowsiness not only affects our learning efficiency but also has a negative impact on our physical health. Therefore, we should try our best to avoid drowsiness, maintain good living and dietary habits, as well as an appropriate amount of exercise.

12. 睡眠与人体免疫力密切相关。著名免疫学家通过“自我睡眠”试验发现，良好的睡眠可使体内的两种淋巴细胞数量明显上升。临床专家的研究表明，睡眠时人体会产生一种称为胞壁酸的睡眠因子。此因子促使白血球增多、巨噬细胞活跃、肝脏解毒功能增强，从而将侵入人体的细菌和病毒消灭。

12. Sleep is closely related to the human immune system. Renowned immunologists have found through the "self-sleep" experiment that good sleep can significantly increase the number of two types of lymphocytes in the body. Clinical experts' research shows that the body produces a sleep factor called muramyl peptide during sleep. This factor promotes the increase of white blood cells, activates macrophages, enhances the liver's detoxification function, thereby eliminating bacteria and viruses that invade the human body.

13. 首先，我们需要明确犯困的原因。犯困的主要原因是缺乏氧气和运动。因此，我们可以通过以下方法来增加氧气和运动量，帮助我们立刻清醒。

13. Firstly, we need to clarify the reasons for feeling drowsy. The main reasons for feeling drowsy are lack of oxygen and exercise. Therefore, we can increase oxygen and exercise through the following methods to help us become immediately alert.

14. 试验表明，每天运动30到45分钟，每周5天。持续12周后，人体的免疫细胞数目会增加，抵抗力也相对增强。运动只要微微出汗、心跳加快即可，给大家

15. 乐观的心态可以维持人体处于一个好的状态。尤其是在现今社会，巨大的心理压力会导致对人体免疫系统有抑制作用的荷尔蒙成分增多，从而降低免疫系统的功能，诱导肿瘤的发生。保持乐观的心态对身体健康至关重要。

14. The tests show that exercising for 30 to 45 minutes daily, five days a week, can lead to an increase in the number of immune cells in the body and a relative enhancement of resistance after 12 weeks. Exercise can be as simple as a slight sweat and an increased heartbeat. 15. A positive mindset can maintain the body in a good state. Especially in today's society, the enormous psychological pressure can cause an increase in hormone components that suppress the immune system, thus reducing the function of the immune system and triggering the occurrence of tumors. Maintaining a positive mindset is crucial for physical health.

16. 卷心菜是富含谷胱甘肽(具有免疫增强功能)的另一植物。在当令时，卷心菜在冬季也很容易获得，而且不贵。把各种各样的卷心菜(白的，紫的，中国的)加到汤里，慢慢炖，可以让抗氧化物释放入汤中，从而增加食物的营养价值。

16. Cabbage is another plant rich in glutathione (with immune-enhancing properties). In season, cabbage is also easily available in winter and is not expensive. Adding a variety of cabbages (white, purple, Chinese) to the soup and slowly simmering them allows antioxidants to be released into the soup, thereby increasing the nutritional value of the food.

17. 第三种方法是喝水。当我们犯困时，我们的身体可能会处于脱水状态，这也会影响的警觉性。因此，我们可以喝一些水，让身体恢复水分和能量。

17. The third method is to drink water. When we feel drowsy, our bodies may be in a state of dehydration, which can also affect our alertness. Therefore, we can drink some water to replenish the body's fluids and energy.

18. 菠菜因富含营养而被称为超级食物。它含有叶酸，有助于产生新的细胞并修复DNA。同样富含纤维素，抗氧化物如维生素C，和其他一些营养。生吃或半熟食用最佳。

18. Spinach is called a superfood due to its rich nutritional content. It contains folic acid, which helps produce new cells and repair DNA. It is also rich in fiber, antioxidants such as vitamin C, and other nutrients. Eating it raw or semi-cooked is best.

19. 第一种方法是深呼吸。当我们犯困时，我们的呼吸往往会变得浅而快，导致缺氧。因此，我们可以试着做几次深呼吸，让氧气充分进入我们的身体，提高我们的警觉性。

19. The first method is deep breathing. When we feel sleepy, our breathing tends to become shallow and rapid, leading to oxygen deficiency. Therefore, we can try a few deep breaths to allow oxygen to fully enter our bodies, enhancing our alertness.