ball-and-socket head是什么意思，ball-and-socket head的翻译，ball-and-socket head音标、读音、用法和例句_开心英文字典

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ball-and-socket head是什么意思，ball-and-socket head的翻译，ball-and-socket head音标、读音、用法和例句_开心英文字典_柠咚词