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1·Carbon is an important chemical element.

碳是一种重要的化学元素。youdao

2·Trees help absorb carbon.

树木帮助吸收碳。youdao

3·The carbon cycle is very important to the Earth.

碳循环对地球很重要。youdao

4·Scientists study the properties of carbon.

科学家研究碳的特性。youdao

5·We need to understand the role of carbon.

我们需要了解碳的作用。youdao

6·Carbon has many uses in life.

碳在生活中有很多用途。youdao

7·Plants use carbon for photosynthesis.

植物利用碳进行光合作用。youdao

8·Carbon can be made into different materials.

碳可以制成不同的材料。youdao

9·The ocean stores a large amount of carbon.

海洋存储大量的碳。youdao

10·Carbon is crucial for the existence of life.

碳对生命的存在至关重要。youdao

碳

1·C/N ratio can be taken as a rooting index of elm tip.

碳/氮比率可作为白榆新梢生根的指标。

2·So, why don't you go ahead and tell me, keeping that in mind, which atom in terms of h c or n would you expect to be in the center of hydrogen cyanide?

那么，请大家来告诉我，并且记住它，你认为氢，碳和氮中哪个原子,应该在氰化氢的中间呢？

3·The results show that suspension casting can make the temperature field uniform, eliminate macro segregation of c, s and p, and improve the quality of bearing steel ingot.

结果表明，悬浮浇注能有效地改善轴承钢锭的温度分布，极大地改善钢锭横截面上的碳、硫、磷元素的中心偏析，提高了轴承钢锭的质量。

4·The good effect has been gained on the hypereutectic Al Si alloys treated with some double refining and modifying agents such as P, S, RE, Sr, Na, C, etc.

采用磷、硫、稀土、锶、钠、碳等进行双重细化变质处理过共晶铝硅合金已取得了良好的效果。

5·In their elementary composition, the enzymes show the usual proportion of c, h, n, and s found in proteins.

从元素组成来看，酶显示出与通常蛋白质一样的碳，氢，氮及硫的元素比例。

(1)vitamin C维生素C

(1)C languageC语言

(1)hepatitis C丙型肝炎；C型肝炎

(1)deg C摄氏度

(1)protein C蛋白质C

(1)middle C[音]中央C