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1·He started to sharpen his knife.

他开始磨刀。《柯林斯英汉双解大词典》

2·I can sharpen scissors, too.

我也会磨剪刀。

3·How do you sharpen your ax?

你如何磨尖你的斧头呢？

4·We need to sharpen up this knife.

我们需要打磨这把小刀。

5·The brave will sharpen their will.

勇敢的人会磨练自己的意志。

6·So let me sharpen my tusks while I can.

所以让我尽可能磨尖我的牙。

7·When the ox falls, they sharpen their knives.

牛倒了，他们就磨刀。

8·The problem with pencils is you always have to sharpen them.

使用铅笔的问题就在于你总是要削尖它们。

9·The first thing I do in the morning is to brush my teeth and sharpen my tongue.

我在早上做的头一件事，是刷我的牙、磨我的舌。

10·He needs to sharpen up before the Olympic trials.

在奥运会选拔赛之前，他需要进一步提高自己。《牛津词典》

锐化

1·You can sharpen edges, or pop highlights on shiny objects for effect.

你可以锐化边缘，或者为发光的物件增加亮度等等效果。

2·And an image editor consumes and emits pixels, applying rules to each pixel or groups of pixels to, say, sharpen or stylize an image.

而图像编辑器将消耗并生成像素，对每个像素或每组像素应用规则从而锐化图像或形成某种风格。

3·This filter will sharpen all the pixels on the layer.

该过滤器将所有的层锐化的像素。

4·Saw fitters repair, set and sharpen band saws, chain saws, circular saws and other types of saw blades according to specifications.

锯钳工根据规格维修，安装并锐化乐队锯，链锯，圆锯和其他类型锯片。

5·The binary lateral inhibition network has strong sharpen effect to peaks, while it has amazing low computation load.

二值化侧抑制网络具有很强的锐化作用，并具有很高的计算效率。

削尖

1·The problem with pencils is you always have to sharpen them.

使用铅笔的问题就在于你总是要削尖它们。

2·Can you sharpen the pencil?

你能把铅笔削尖吗？

3·The lead broke on this pencil, so I have to sharpen it.

这支铅笔的笔芯断了，所以我只好削尖它。

4·Please sharpen the pencil.

请削尖这支铅笔。

5·Is your head naturally pointed or do you have to sharpen it every day?

你的脑袋天生是尖的，还是你每天把它削尖？

磨刀

1·The women on that mountain worked harder than any I'd ever met. They taught me the value of a whetstone to sharpen my knives, how to store food in the creek and keep it cold and safe.

山上的女人们是我见过的干活最卖力的，他们教会了我如何发挥磨刀石的作用去磨刀，以及如何在小溪里的低温下安全的存储食物。

2·Easy to sharpen and easy to clean. Your knives are a blessing.

磨刀容易，清理简单，你们的刀真乃厨师之福。

3·The fisherman cannot be said to be losing time when he is mending his nets, nor the mower when he takes a few minutes to sharpen his scythe at the top of the ridge.

渔夫坐下补网，你能不能说他虚耗时间呢？ 割草者坐下磨刀，你能不能说他虚耗时间呢？

4·Avoid overwhelm by taking time to sharpen the saw.

避免过度花费时间磨刀。

5·Now he didn't sharpen it as hard as in the past and nothing was more suitable as a killing weapon.

他在磨刀时，不用再像以前那样费劲了，而且作为杀死仇人的武器它再合适不过了。

激化

1·In my case, I didn't know how filters work, so I didn't know that I could trace the edges of my image, and that I could sharpen them, and so on.

在我而言，我不知道如何过滤器的工作，所以我不知道我可以追查的优势，我的形象，我可以激化他们，等等。

2·The Spear Point blade shape is great for a variety of cutting tasks, is easy to sharpen, and makes a great addition to any collection.

矛点叶片形状是伟大的一切割各种任务，很容易激化，使一个伟大的除了任何集合。

磨快

1·If he does not relent, he will sharpen his sword; he will bend and string his bow.

若有人不回头，他的刀必磨快。弓必上弦，预备妥当了。

2·Sharpen your blades and fasten your armor because Vikings will be returning with a brand-new season in 2015.

磨快你的刀刃穿上你的盔甲，因为《维京传奇》新一季即将在2015年回归。

磨尖

1·How do you sharpen your ax?

你如何磨尖你的斧头呢？

2·So let me sharpen my tusks while I can.

所以让我尽可能磨尖我的牙。

(1)sharpen up使……更敏锐；认真思考