hones

1.磨练,训练

2.用磨刀石磨;磨光;金属表面磨损

3.〈非正式,旧〉抱怨,嘀咕

4.〈非正式〉渴望,想念

1.(细)磨刀石

2.磨孔机

1.to improve a skill or talent that is already well developed

2.to make the blade of a knife sharp by rubbing it on a special stone

3.to whine

4.to hanker, to yearn

1.a fine-grained sedimentary rock used as a whetstone for sharpening razors and other cutting tools.

2.a tool with a rotating abrasive head, used to bore holes