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单词 retainer
释义
re·tain·er 1 (rĭ-tānər)
n.
1. One that retains, as a device, frame, or groove that restrains or guides.
2. Dentistry An appliance used to hold teeth in position after orthodontic treatment.
3.
a. An employee, typically a long-term employee.
b. A servant or an attendant, especially one in the household of a person of high rank.
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