sharpen
v[I, Tn]
(cause sth to) become sharp (使某物)锋利, 尖锐, 陡峭, 清晰, 强烈
The tone of his letters has sharpened (ie become less friendly) recently. 他最近来信的口气变得刻薄起来.
sharpen a pencil 削铅笔
This knife needs sharpening. 这把刀要磨一下.
This incident has sharpened public awareness of the economic crisis. 这件事提高了公众对经济危机的认识.
sharpen sb's wits, ie make sb more mentally alert 使某人更机智.
🌿 同词根单词
shiftvt.& vi. 改变;去掉;摆脱掉;换挡;
vt. 换…的衣服,更(衣);卖,出售;[计算机]使(数据)位移;
vi. (汽车)换挡;换衣服;蒙混;自己谋生;
n. 移动,转移,转换;变迁,变化,变换,替换,更换,掉换,更易,代用;(汽车等的)变速;
On the subject of reading, Francis Bacon, who lived at about the same time as shakespeare, wrote these words, Some books are to be tasted, others to be swallowed, and some few to be chewed and digested. This good advice shows how it is possible to read