Use two commas, not one, to set off a nonrestrictive clause in the middle of a sentence.
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。
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。