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- chemistry need oxygen 化学需氧量
- Earth people need oxygen to breathe. 地球人需要氧气来呼吸，
- I think your brain is sealed in mylar and seriously need oxygen. 我认为你的大脑被密封在了聚脂薄膜里，急需要补充氧气。
- It is commonly believed that people yawn as a result of drowsiness or weariness because they need oxygen. 普遍看法认为，人们打呵欠是由于困乏或疲倦造成的，因为他们需要氧气。
- And when diving,marine mammals'blood travels only to the parts of the body that need oxygen,such as the heart,the brain and the swimming muscles. 当潜入水中时，海洋哺乳动物的血液仅流经身体需要氧气的部位，如心、脑和游泳用的肌肉。
- He says the Schistosoma parasite needs oxygen to survive. 他说，血吸虫属的寄生虫需要依赖氧气存活。
- And when diving, marine mammals' blood travels only to the parts of the body that need oxygen, such as the heart, the brain and the swimming muscles. 当潜入水中时，海洋哺乳动物的血液仅流经身体需要氧气的部位，如心、脑和游泳用的肌肉。
- Fish need oxygen to survive.If your guppies are gasping at the water's surface, this is a sign that there is not enough oxygen in the tank for the number of fish you have. 孔雀鱼需要氧气才能存活，所以当我们看到它们无力的浮游在水面上换气时，这就是一种警讯并代表饲养缸里的水中含氧量不足。
- We need oxygen to support life. 我们需要氧气维持生命。
- Yawning involves opening the mouth involuntarily while taking a long, deep breath of air. It is commonly believed that people yawn as a result of drowsiness or weariness because they need oxygen. 打呵欠使人在不由自主张开嘴的同时，能长长的、深深的吸一口气。普遍看法认为，人们打呵欠是由于困乏或疲倦造成的，因为他们需要氧气。
- This is interesting for the Plumeria Kingdom to think about as humans need oxygen to breathe to sustain health of the body more than they require oxygen to clean their clothes or freshen the home. 这是让鸡蛋花王国很有趣来思考的，因为比起需要氧气来清洁衣服或者清新居家，人类更需要氧气来呼吸以保持身体健康。
- Aerobic An organism, such as top fermenting ale yeast, that needs oxygen to metabolize. 一种生物体，像上部发酵用做淡色啤酒的酵母一样，需要氧气来进行新陈代谢。
- We have three periods of chemistry a week. 我们一星期三节化学课。
- I need a piece of string to tie this parcel up. 我需要一根细绳把这包裹扎起来。
- The yeast needs oxygen to produce lipids in their cell walls to protect themselves against the alcohol toxicity near the end of fermentation. 酵母需要氧气产生的细胞壁脂类保护自己免受酒精发酵毒性接近尾声。
- The scientist probed into the secrets of chemistry. 这位科学家探索了化学的种种奥秘。
- Pregnant women who smoke deprive their babies of needed oxygen and other nutrients which may result in low birth weight. 怀孕妇女若抽烟的话会阻碍胎儿需要的氧气及其他养份，因此造成婴儿出生过轻。
- Chemistry was her favourite subject at school. 她上学时最喜欢化学。
- No one can cope with him in Chemistry. 在化学方面，谁也比不上他。
- I am not good at organic chemistry. 我的有机化学学得不好。
