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1·Exercise sharpens your appetite.

运动增进你的食欲。

2·The cocktail sharpens his appetite.

鸡尾酒刺激他的食欲。

3·My Adversary sharpens His eyes at me.

我的敌人以锐利的眼看著我。

4·Reading mystery novels, for example, sharpens your mind.

比如阅读推理小说，使你的思维敏捷。

5·Absence sharpens love, presence strengthens it. — Proverb.

相聚爱益切，离别情更深。- - -谚语。

6·17a man sharpens a knife on a street in Havana September 22, 2010.

2010年9月22日，一个在哈瓦那的街头磨刀的人。

7·The cat doesn't even say, Thank you! he just sharpens his claws.

猫咪连谢谢都没说。他只是一个劲的磨爪子。

8·Third step, the synthesis relation, sharpens the utilization ability.

第三步，综合联系，提高运用能力。

9·He that wrestles with us strengthens our nerves, and sharpens our skill.

与我们摔跤的人坚强了我们的神经并且提高了我们的技能。

10·Conversely, empowering him, in the dread jargon of sociology, sharpens up his mind.

相反地，社会学有专用术语- - -授权，即权力显著提高人的思维。

(1)sharpen up使……更敏锐；认真思考