It is necessary to examine how the proposals can be carried out.

有必要调查一下怎样才能实施这些方案。

《牛津词典》

If you have small children, you know how difficult it can be to find and pay for a baby-sitter.

如果你有一个小孩儿，你就会明白找到一个婴儿保姆并给他酬劳是多么的困难。

youdao

Occasionally one can determine whether stone tools were used in the right hand or the left, and it is even possible to assess how far back this feature can be traced.

偶尔，人们可以确定石器是用在右手还是左手上，甚至可以评估这种特征可以追溯到多远以前。

youdao

It is really just a look at alcohol, how it affects students, how it can be a detriment to their progression as a student."

VOA: special.2011.07.29

And it's not hard to see how the heat of reaction at room temperature can be related to they heat of reaction at other temperatures.

知道室温下的反应热,如何与其他温度下的反应,热联系起来这点并不困难。

麻省理工公开课 - 热力学与动力学课程节选

But not yet seeing how to explain it is not the same thing as seeing that it can't be explained on physicalist terms.

但是不知道,怎么解释并不等于,不能用物理主义解释

耶鲁公开课 - 死亡课程节选

There, I witnessed how badly people can treat one another, how much damage it can do, and how difficult and terrifying it can be to start over.

FORBES: Connect

Nokia knows how rapidly the landscape can shift in the mobile industry, and how hard it can be to make profits from smartphones.

BBC: Samsung, Apple, Nokia and the smartphone dogfight

On the other hand, she is sensitive to how difficult it can be to raise children while working hard and she writes about that subject with sophistication and thoughtful reflection on her first-hand experience.

FORBES: 10 Things Sheryl Sandberg Gets Exactly Right In 'Lean In'