backing block; 靠枕
swivel block 转枕
Zhen Yuan 枕元
pillow one's head on one's arm; 头枕手臂
He laid down his head upon his pillow to rest. 他把头枕在枕头上休息。
牛津高阶第八版
美国韦氏词典
Dictionary.com
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维基百科 (自由的百科全书)