nonrestrictive

a. 非限制性的

non.re.stric.tive

adj.（形容词）
Not restrictive:
不限制的：
例句：
nonrestrictive zoning.
无限制分区

Grammar Of, relating to, or being a subordinate clause or phrase that describes but does not identify or restrict the meaning of the noun, phrase, or clause it modifies, as the clausewho live in a small condo in the sentence The Smiths, who live in a small condo, have cats.
【语法】 非限制性的：属于、关于或是从句或者短语的，此短语或者从句描述但并不认同或者限制它所修饰的名词、短语或从句的意思，如在句子The smiths,who live in a small coodo, have cats 从句中的 who live in a small condo