sharpenvt.使尖锐;磨快;加剧vi.变尖锐
sharpening steel锋钢
sharpened pencil削尖的铅笔
sharpen the pain加重痛苦
sharpening device刻石器
sharpening method刃磨方式
sharpen one's wits增长才智
sharpening circuit锐化电路
sharpen a contrast加强差别
sharpening machine磨钻机
sharpener amplifier锐化器放大器