单词nonrestrictive
adj.: 【语】非限制性的
网络: 非限制性同位语；非限制子句；非限制性定语从句
【语法】非限制性的
非抗震的
Nonrestrictive clauses tell you something about the subject of a sentence, but they do not limit, or restrict, the meaning.
非限制性从句告诉你关于句子主语的某些事情，但并不对其含义进行限定；
When a nonrestrictive clause appears at the end of a sentence, place a comma before it and a period after it.
当非限制*成分出现在句末时，在它前面加逗号，后面加句号。
When a nonrestrictive clause appears in the middle of a sentence, place commas around it.
当非限制*成分在句子中间出现时，应当在它前面和后面加逗号。
Use two commas, not one, to set off a nonrestrictive clause in the middle of a sentence.
用两个逗号，而不是一个，来分隔非限制性从句。
These nonrestrictive units had concrete floors on an interior steel frame.
这些非抗震单元在内部为钢构架上是水泥地板。
In the nonrestrictive sentence, the store honored all the complaints, all of which were less than 60 days old.
而在非限制性从句中，商店处理了所有之投诉，这些投诉都是60天内发生之。
Cross References: Dependent Clauses and Phrases; Clauses -- Restrictive and Nonrestrictive
参考：从属从句和短语；限制性从句和非限制性从句