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- Water contains hydrogen and oxygen. 水含有氢和氧。
- Oxygen enters into many compound bodies. 氧是许多化合物的组成部分。
- It won't hurt you, but chemicals will. 它不会伤害你，但是农药会。
- The plant has recalled lids which leached out dangerous chemicals. 那家工厂回收了浸滤危险化学物质的盖子。
- Noxious chemicals are found in the river water. 河水里发现了有毒化学物品。
- Chemicals that produce a noxious vapor when mixed. 化学物质混合后会放出有毒气体
- Mars is too dry and poor in oxygen. 火星上面过于干燥，并且缺乏氧气。
- Water is composed of hydrogen and oxygen. 水由氢和氧组成。
- A place where drugs and chemicals are manufactured. 药厂用于生产药品和化学物质的地方
- Fish take in oxygen through their gills. 鱼通过鳃摄取氧气。
- The oxygen react vigorously with the impurity in the iron. 氧气与铁中的杂质发生剧烈的化学反应。
- He demonstrated the principles with chemicals and test tubes. 他借助化学药品和试管讲解了这些原理。
- oxygenated chemicals 含氧化合物
- Mr. Chen used no (didn't use any) chemicals on his fruit. 陈先生的水果不使用农药。
- The oxygen workshop caught fire and set off a chain of explosions. 氧气车间着了火，引起了一连串的爆炸。
- Plants can absorb carbon dioxide and release oxygen. 植物可以吸收二氧化碳释放氧气。
- Water is composed of the elements hydrogen and oxygen. 水是由氢元素和氧元素组成的。
- Chemicals in the body break our food down into useful substances. 人体中的化学元素把食物分解成有用的物质。
- There was a shortage of oxygen at the top of the mountain. 山顶上缺氧。
- Over ninety countries ratify an agreement to ban the use of these chemicals. 九十多个国家批准了一项禁止使用这些化学品的协议。
