sharpen with a whetstone
用磨刀石磨。
[usu.
使更锋利(或更强烈、更集中、更有效)
-
their appetites were honed by fresh air and exercise .新鲜空气和运动使他们的食欲更加旺盛了。
a whetstone, especially one used to sharpen razors
(细)磨石,油石(尤指用于磨剃须刀)。
[mass noun]the stone of which whetstones are made
(制造磨刀石的)磨石块。
"Middle English: from Old English