vt.使尖銳；磨快；加劇

vi.變尖銳

My pencil is blunt, could you lend me a knife to sharpen it? 我的鉛筆鈍了，你能借我把刀子削一削嗎？

Generations of urban living sharpened their wits. 世代居住在城市里使他們磨練了才智。

Strikes will sharpen the country's dilemma. 罷工將加劇這個(gè)國家的困境。

The soldiers sharpened up their knives. 戰(zhàn)士們把刀磨得鋒利。

Jane voice sharpened as she became impatient. 簡變得不耐煩了，聲音也變尖了。

The debate sharpened considerably. 辯論變得相當(dāng)激烈。