It was the sound of a knife being sharpened.

那原来是磨刀声！

The tip of the pencil needs to be sharpened.

铅笔头该削尖了。

That helps to reduce stress and sharpen concentration.

这样能帮助减少压力，使注意力更加敏捷。

Feifei, can you explain to our listeners why I'm sharpening an axe in the studio.

菲菲，你能和听众解释一下我在演播室里磨斧头的原因吗？

Sharpen your pencils before the test.

考试前把你的铅笔都削尖。

The scientists are excited about how the technology might sharpen the pictures produced by radio telescopes.

对于这项技术如何将射电望镜产生的图片更清晰，科学家们对此非常兴奋非常期待。

When you sharpen a pencil, you make chips.

当你削铅笔时，会有木屑。

The goal is to sharpen their people skills.

目标是提高她们的人际交往能力。

Tip number one is to sharpen the axe.

秘诀一是把斧头磨锋利。

Ellie sharpened her creative skills at school.

埃莉在学校里增强了她的创造力。

But soon stones were being shaped and sharpened.

但不久人们就把这石头打造成尖锤。

This week he seemed to sharpen things up.

这周，似乎他向我们摊了牌。

Sharpen the blade before you cut the meat.

在切肉前先把刀刃磨利。

If you keep feeling a point that has been sharpened, the point cannot long preserve its sharpness.

揣而锐之，不可长保。

You know, Sherlock Holmes liked to use cocaine to sharpen his focus.

神探福尔摩斯喜欢用可卡因来让自己集中注意力。

The knives he spoke of were sharpened for the purpose.

他提到的刀就是为此而磨的。

They cover all the different skills —buying them, sharpening, chopping techniques.

里面包含各种不同种类的技能—买刀，磨刀，切菜技巧。

It sharpens your memory by improving both storage and memory recall.

通过提高存储和回忆能力来增强记忆力。

The hells we have lived through and live through still have sharpened our senses and toughened our will.

我们经历过及正在饱尝的艰难困苦生活艰辛会历练我们的人生并且磨炼我们的意志。

Elongated pupils help sharpen certain dimensions of an animal's vision.

细长的瞳孔有助于提高动物视觉的某些维度。