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1.carbon dioxide 二氧化碳
例句：You can liquefy the carbon dioxide to separate it from the other constituents.
可以将二氧化碳液化，以便和其他成分分开。
2.deal with 应付
例句：I'll deal with the children later.
孩子们的事由我以后去处理。
3.similar to 与……相似
例句：You should end up with something similar to what I have below.
操作结束后，你应该会得到与下图相似的结果。
4.less than 不到
例句：Seven is two less than nine.
9比7少2。
