1. The book deals with the essentials of English grammar.
   这本书论述英语语法的要点。
2. The core of regular contributors is essential to the magazine.
   有一群经常投稿的人对这份杂志是极为重要的。
3. What is the essential difference between these two economic systems?
   这两种经济体制的本质区别是什么?
4. Elbow pads and knee pads are essential on a skateboard.
   滑滑板时带护肘和护膝是必要的。
5. Delete what is dispensable and give more prominence to the essentials.
   可以不说的去掉，该说的就可以更突出。
6. LuXun -died the essential character is tics of China's intellectuals.
   鲁迅是中国知识分子的主要特性的具体代表。
7. These factories produce raw materials, intermedium, functional pigment, trophism essential oil etc.
   为了满足日益增长的植物提取物的出口需要，新世界集团在一些天然产物的原料产地正在建设新的植物提取物生产厂，生产包括原料药、中间体、功能性色素、营养性精油等天然产品。
8. In scientific discussions it is essential to guard against subjectivism and arbitrariness.
   在科学讨论中要严防主观武断。
9. Peptide deformylase (PDF) is an essential enzyme involving in bacterial protein biosynthesis.
   肽脱甲酰基酶是细菌蛋白质合成过程中一种关键酶。
10. A good sleeping bag is an essential part of every campers equipment.
    一个完好的睡袋是每个露宿者必不可少的装备。
11. I have levied on many writers for my essential conception of American culture.
    我从许多作家的作品中获得有关美国文化的基本概念。
12. First quests the essential connote of the beauty of neuralization from character angle.
    (一)、从文字学的角度考察“中和”之美的本质内涵。
13. Protein folding invitro is a new essential unit operation in biological processing engineering.
    摘要蛋白质折叠技术是生物工程的新“单元操作”。
14. ObjectiveTo study the chemical constituents of essential oil from Daucus carota L.from Guizhou Province.
    目的分析鹤虱风挥发油成分。

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