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- major chemical elements 主量化学组成
- We must include this chemical element in the group. 我们必须使组里包括这种化学元素。
- Carbon and hydrogen are chemical elements. 碳和氢是化学元素。
- Content of Other Chemical Element Max. 化学元素含量,不大于。
- Hydrogen is the lightest chemical element of all. 氢是所有化学元素中最轻的。
- The company has evolved into a major chemical manufacturer. 这家公司已逐步发展成一个主要的化工厂。
- He could recite the names of all the chemical elements. 他能够朗诵所有化学元素的名字。
- The tendency of chemical elements with similar positions in the periodic table to have similar properties. 周期律化学元素在周期表中有相似位置时具有相似特性的趋势
- Cooking oil fume, one of major indoor air pollutions with chemical elements, greatlyly harms the health of professional workers exposed to it. 烹调油烟是室内主要空气污染物之一,化学成分复杂,严重影响职业接触人群的健康。
- We know of a major chemical com pany that in the recent era of supergrowth declared a goal of growing ten times bigger in ten years. 我们知道这样一家重要的化工公司，在其发展的鼎盛时期宣称要在今后的十年内实现十倍的增长。
- The discovery of the chemical element is a happy accident. 发现这种化学元素纯属偶然。
- So they represented this chemical element with a solar symbol. 所以他们用太阳符号来代表这种化学元素。
- Semimetallic chemical element, chemical symbol B, atomic number 5. 半金属的化学元素，化学符号B，原子序数5。
- Summarize the chemical element of momordica charantia. 对苦瓜的化学成分进行了概述。
- Conclusion The major chemical constituents of essential oil in Eupatorium adenophorum are terpenes. 结论紫荆泽兰挥发油的主要化学成分为萜类化合物。
- Its major chemical constituents, including steroid saponin, ecdysone,flavones and so on, have been reported. 其主要的化学成分为甾体皂苷类、植物蜕皮激素类、黄酮类、甾醇类。
- The rest of the chemical elements occur in only minor or trace quantities. 其余的化学元素仅以少量或微量出现。
- Lactones are major chemicals used in the preparation of other organic reagents. 内酯是制备其他有机试剂的重要化学品。
- A form of matter hypothesized by proponents of the big bang theory to have existed before the formation of the chemical elements. 原元素(依论)宇宙大爆炸理论中的假设存在于化学物质形成之前的物质形式
- It was the world's first major chemical attack using sarin, a nerve agent which attacks the respiratory system. 这是世界上首宗使用沙林神经毒气施袭的重大化学武器事件。
