详细解释:vt. 使尖锐, 使敏捷, 加重, 削尖
vi. 尖锐化, 变锋利
词型变化：
名词:sharpener动词过去式:sharpened过去分词:sharpened现在分词:sharpening第三人称单数:sharpens英语解释：
动词 sharpen:
make sharp or sharpermake sharp or sharperbecome sharp or sharperput (an image) into focus同义词：focus, focalize, focalise