[体]减量练习

使……更敏锐；认真思考

hardening up───使坚硬

smartening up───变潇洒；变漂亮

shaping up───顺利发展；形成；成形

sharpen up───使……更敏锐；认真思考

sharpened up───使……更敏锐；认真思考

sharpening───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

sharpenings───锐化

sharpens up───使……更敏锐；认真思考

happening upon───偶然发现；偶然碰见

Abrasive grain makes up only 30% weight; its self-sharpening action is weaker, resulting in lower grinding efficiency.───磨粒只占总重的30%；其自锐性弱，因而磨削效率很低。

A bit of time spent sharpening up your writing skills combined with your interest in gaming and a desire to share your knowledge with others can easily add up to a great job!───花一点时间提高你的写作技术，加之对游戏的兴趣，以及与他人分享的渴望，便可轻松获得这项给力的工作！

For me, it's just making little tweaks here and there, sharpening up the stroke.───就是说我要在这个地方减少出手次数，提升突破成功率。

Instead of sharpening up their act, they sharpen up their prices and cover their tracks.