Use two commas, not one, to set off a nonrestrictive clause in the middle of a sentence.
同样的，前者由非限制性定语从句构成。 但在科技文中，你需要将其转换成名词结构。
When a nonrestrictive clause appears in the middle of a sentence, place commas around it.
当非限制性成分在句子中间出现时，应当在它前面和后面加逗号。
When a nonrestrictive clause appears in the middle of a sentence, place commas around it.
如果这组单词是两个句子，则需在相应位置添加句号。 两句的句首单词均应大写。
Nonrestrictive phrase and clause are set off by commas.
非限制性短语或从句前后用逗号分隔。
Nonrestrictive phrase and clause are set off by commas.
非限制性短语或从句前后用逗号分隔。
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