Retainer
01
仆人, 侍从
a person working in the service of another (especially in the household)
02
保持器, 牙齿固定器
a device used to maintain the position of teeth after braces are removed
语法信息
有生性状态
无生命
形态构成
复合词
可数
复数形式
retainers
例子
After braces, Jenny wore a retainer to keep her teeth straight.
在牙套之后，珍妮戴了一个保持器来保持她的牙齿整齐。
03
酬金, 预付款
a fee charged in advance to retain the services of someone
