Sometimes these gifts not only cover expenses associated with the infant's birth, but extras, too, like a vacation.

有时，这些礼金不仅涵盖了与婴儿出生相关的费用，还能用作其他额外用途，比如旅游。

youdao

You could save a fortune by using an insurance policy to cover the extras demanded by rental firms at foreign airports.

你可以通过使用保险制度来付外国机场租车公司要求的额外费用以此省一笔钱。

youdao

Some allow you to add riders to cover extras like the mechanical elements of a pool system or hot tub.

WSJ: Is a Home Warranty Necessary in a Hot Market?--WSJ House Talk