化学的例句（化学在句子中的用法）

• The same water was reused after chemical treatment. 原来的水经过化学处理之后再度使用。
• Scientists tried out thousands of chemicals before they found the right one. 科学家们试验了数千种的化学药品才找到一种合适的。
• A police put some chemicals on the piece of paper and a line of words showed up. 一位警察在一张条上涂上化学药品, 一行字迹清晰地显现出来。
• Chemicals are used to keep the insects down. 化学药品用于阻止昆虫滋生。
• He is reading a text in chemistry. 他在看化学教科书。
• Soil consists of various chemical substances. 土壤由各种化学物质组成。
• For her twelfth birthday, she asked for a chemistry set. 她要一个化学箱作她12 岁生日的礼物。
• The heat brings about a chemical reaction, and oxygen is liberated. 热量引起化学反应, 释放出氧气。
• A chemist can isolate the oxygen from the hydrogen in water. 化学家可以把水中的氢和氧分离开来。
• inflammable chemicals 易燃的化学品
• chemicals that are very ineffective in killing weeds 完全不能有效清除杂草的化学品
• An imbalance in certain chemicals leads to disturbances in the brain’s function. 某些化学成分失衡会道致大脑功能的紊乱。
• The new chemistry lab was paid for by friends of the college. 新的化学实验室是由学院的资助者出钱建的。
• The chemical formula for water is H2O. 水的化学分子式是H2O。
• The student was excellent in chemistry. 这个学生的化学成绩优异。
• The wrong chemical balance can cause severe distortion of the photographic image. 化学药水不合比例可引致摄影图像的严重失真。
• Carbon is an element,while carbon dioxide is a compound. 碳是一种(化学)元素,而二氧化碳则是一种化合物。
• When two or more elements combine and form a compound, a chemical change takes place. 当两种或两种以上的元素结合形成化合物时, 发生化学变化。
• A chemist can separate a medicine into its components. 化学家能把一种药物的各种成分分解出来。
• These substances are sometimes combined with other chemicals, such as chlorine. 这些物质有时可与其他化学品化合，例如氯。