例句與用法

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1. use two commas, not one, to set off a nonrestrictive clause in the middle of a sentence
   用兩個逗號，而不是一個，來分隔非限制性從句。
2. when a nonrestrictive clause a ears in the middle of a sentence, place commas around it
   當非限制性成分在句子中間出現(xiàn)時，應(yīng)當在它前面和后面加逗號。
3. when a nonrestrictive clause appears in the middle of a sentence, place commas around it
   當非限制性成分在句子中間出現(xiàn)時，應(yīng)當在它前面和后面加逗號。
4. when a nonrestrictive clause a ears at the end of a sentence, place a comma before it and a period after it
   當非限制性成分出現(xiàn)在句末時，在它前面加逗號，后面加句號。
5. when a nonrestrictive clause appears at the end of a sentence, place a comma before it and a period after it
   當非限制性成分出現(xiàn)在句末時，在它前面加逗號，后面加句號。