全部

1·The sea air sharpened our appetites.

海上的空气增进了我们的食欲。《牛津词典》

2·The outline of the trees sharpened as it grew lighter.

随着天色转亮，树的轮廓变得清晰了。《牛津词典》

3·Her gaze sharpened, as if she had seen something unusual.

她眼睛一亮，好像看到了不寻常的东西。《柯林斯英汉双解大词典》

4·How can knives be sharpened?

刀是怎样变锋利？

5·When the students came in, sharpened pencils in hand, there was not a bluebook in sight.

学生们进来时，手里拿着削好的铅笔，所见之处一本蓝皮书也没有。

6·You just kind of swept them under the rug, but now, you are out there in full force with your knives sharpened.

你本只是把他们藏在地毯下面，但现在，你拿着锋利的刀，全副武装。

7·The knives will be sharpened soon.

刀不久就会磨的。

8·So he had it sharpened.

因此他要把刀磨锋利了。

9·He believed that Numbers sharpened debate.

他相信，数字会激化争议。

10·The debacle of the 2009 elections sharpened their scepticism.

而2009年选举的惨败，更加重了他们的怀疑。

(1)sharpen up使……更敏锐；认真思考