CUJS和理文编辑 (http://www.liwenbianji.cn/welcomecujs.htm) 联合推出英文写作贴士 英文写作小贴士 No. 1：Correct Comma Usage 逗号是最难掌握的标点符号类型；逗号使用不当会改变意思。仔细阅读逗号的限制性和非限制性信息。 最恰当的用法： The equipment that we used was made by the XX Company. 可行的用法： The equipment which we used was made by the XX Company. 错误用法： The equipment, which we used, was made by the XX Company. 正确用法： The equipment, which was made in Shanghai, was very expensive. -当你校对时，注意以下文字：that, which, and who；问你自己，此信息重要吗，或是否可以作为多余信息来省略? -如果此信息是重要的,不要使用逗号。 -如果此信息是多余和不重要，必须使用逗号。 同时我们在写作助手一栏里列出了一些帮助提高英文写作水平的链接，希望能为您的英文写作提供便利