名词是signature He traced his signature laboriously. 他吃力地签上自己的名字. On (ie As a result of) further examination it was found that the signature was not genuine. 经过进一步的调查发现签名不是真迹. This document bore his signature. 这份文件上有他的签名. sign是动词 Should I sign my name in pencil or ink? 我用铅笔还是用钢笔签字?
