- a coupling between two parts enabling one to revolve without turning the other转体。
(swivelled, swivelling; <美> swiveled, swiveling) ［often with adverbial］
- turn around a point or axis or on a swivel（在转体上, 或绕着一点或轴）旋转：
no obj. he swivelled in the chair他坐在转椅里转来转去
with obj. she swivelled her eyes round.她的眼睛转来转去。
词源
Middle English, from the base of Old English swīfan 'to move (along a course), sweep'.