His chairs can swivel, but they can't move up or down.他的椅子能旋转，但是不能升降。She sat down in the swivel chair behind her desk.她在书桌后面的转椅上坐下。The gun was mounted on a swivel.火炮置于转环上。He leaned back in the swivel chair and locked his fingers behind his head.他仰靠在转椅上，十指交叉枕在脑后。