sharpener
['ʃɑ:pənə]
n.卷笔刀, 研磨者,研磨工具
例句与用法：
A tool for breaking hard surfaces, consisting of a curved bar sharpened at both ends and fitted to a long handle.
镐，鹤嘴锄破坏坚硬表面的工具，由两端有弯曲锋利的尖和用来固定尖的长把组成
The tone of his letters has sharpened (ie become less friendly) recently.
他最近来信的口气变得刻薄起来。
Generations of urban living sharpened their wits.
世代居住在城市里使他们磨练了才智。
The soldiers sharpened up their knives.
战士们把刀磨得锋利。
词形变化：
名词: sharpener | 动词过去式: sharpened | 动词过去分词: sharpened | 动词现在分词: sharpening | 动词第三人称单数: sharpens |
详细释义：
n.
1. 磨具
2. 卷笔刀
3. 磨削者