retainer

🇬🇧/rɪˈteɪnə(r)/ 🇺🇸/rɪˈteɪnər/📚 17907 6 1GRE
A retainer is a fee that you pay to someone in order to make sure that they will be available to do work for you if you need them to. 预付聘金

noun [专属名词]保持器;家臣;保持者;[机] 护圈;预付费用

I'll need a five-hundred-dollar retainer.
我将需要一笔500美元的预付聘金。

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