retainer
n.(名词)One that retains, as a device, frame, or groove that restrains or guides.护圈,定位器:保持起限制或指引作用的装置、框架或沟槽的设备Dentistry An appliance used to hold teeth in position after orthodontic treatment.【牙科学】 牙架,固位体:在牙治疗之后用于保持牙位的用具
An employee, typically a long-term employee.雇员,尤指长期雇员A servant or an attendant, especially one in the household of a person of high rank.仆人或服务员,尤指高阶层人士家中的
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n.(名词)The act of engaging the services of a professional adviser, such as an attorney, a counselor, or a consultant.职业顾问者:从事职业顾问服务的行为,如律师、法律顾问或咨询医生The fee paid to retain a professional adviser.聘金:雇用职业咨询师所付的费用