您要查找的是不是：
- I make a carbon copy of my documents. 我用复写纸复写文件。
- Soft drinks contain carbon dioxide. 软饮料中含有二氧化碳。
- I have some carbon paper somewhere or other. 我记得我在什么地方放有复写纸。
- She's a carbon copy of her sister. 她跟她姐姐一模一样。
- trivalent carbonn. 三价炭
- trivalent carbon hypothesis 三价碳假说
- A copy made by using carbon paper. 复写本，副本用复写纸复印的一份
- Of or containing trivalent nickel, Ni3+. 含三价镍的有或含三价镍的，Ni3＋
- Plants can absorb carbon dioxide and release oxygen. 植物可以吸收二氧化碳释放氧气。
- This is one trival work intractably again. 这是一项繁琐又棘手的工作。
- He hopes to have a world trival. 他希望能有一次环球旅行。
- I hope to have a world around trival. 他希望能有一次环球旅行。
- You receive the top copy of the receipt, and we keep the carbon. 你把这收据上面的原件收下，我们保留下面的复写件。
- The stick of carbon is often used in an electric arc lamp. 碳精棒常用于电弧灯。
- Having a ring composed exclusively of carbon atoms, as benzene. 碳环的有一个仅由碳原子组成的环的，如苯
- A radioactive isotope of carbon, especially carbon 14. 放射性碳碳的一种放射性同位素，尤指碳14。
- Trivalent arsenic was more clastogenic than pentavalent arsenic. 三价砷的致染色体畸变作用大于五价砷。
- The history of trivalent chromium electroplating was looked back. 回顾了三价铬镀铬的历史。
- Carbon dioxide consists of carbon and oxygen. 二氧化碳是由碳和氧组成的。
- Plants absorb carbon from the air. 作物从空气中吸收炭。
