v. （使）变得锋利；（感情或感觉）加强；（使）尖锐；（使）提高，改善；（使）声音变得刺耳（sharpen 的现在分词）
n. 削尖
1.But the improved performance may not be a sign of wit-sharpening.
然而这一表现的改善并不代表着智力上的提升。
2.You had to keep on sharpening the point too because it soon got blunt.
你也必须不停地磨笔尖，因为它太容易变钝了。
3.Keep your hooks sharp, but be careful sharpening them.
保持你的钩子足够锋利，但是要小心的打磨它们。
4.He is sharpening a pair of blunt scissors with a whetstone.
他在用磨刀石磨一把不锋利的剪刀。
5.Life is always sharpening edge.
生命在于锐利锋芒。
6.When sharpening your career skills, focus more on less.
磨练职业技能，在精不在多。
7.He cut his finger while sharpening a pencil.
他削铅笔时把手指割破了。