It was the sound of a knife being sharpened.

那原来是磨刀声！

That helps to reduce stress and sharpen concentration.

这样能帮助减少压力，使注意力捷。

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？

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。

Sharpen your pencils before the test.

考试前把你的铅都削尖。

When you sharpen a pencil, you make chips.

当你削铅时，会有木屑。

This week he seemed to sharpen things up.

这周，似乎他向我们摊了牌。

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。

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。

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

而锐之，不可长保。

That knowledge will help sharpen climate projections in the 21st century.

这些知识将有助于增强 科学家在二十一世纪的气候预测。

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

我们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。

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。

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。

But he saw nothing, save peaks of rock that were sharpened like needles.

但是他什么也没看见，除了像针一样尖锐的岩石的顶端。

The issue liquid-crystal clear, someone will have to take the screen-time to sharpen it.

这个液晶清晰的问题，有人将不得不采取屏幕时间来锐化它。

She was Gerald's own daughter and the shrewd trading instinct she had inherited was now sharpened by her needs.

她是杰拉尔德的亲生女儿，父亲遗传给她的那种狡猾的商本能现在由于需要而磨练得炉火纯青了。

It sharpens your concentration, and it encourages you to be present and engaged.

它能提高你的注意力，鼓励你活在当下，全身心投入。