You have to keep encouraging them and checking on them. Just like Danny, for some children, getting them to go to school is the toughest thing.

你要一直鼓励他们并检查督促他们。就像丹尼一样，对一些孩子而言，让他们坚持上学是最难的事情。

youdao

As time passed and work with their respective first clients became more and more difficult, John and Sue realized that they had been assigned two of the toughest clients in town.

随着时间的流逝，和他们各自的第一批客户一起工作变得越来越困难，约翰和苏意识到他们被分配给了镇上两个最难对付的客户。

youdao

He faces the toughest test of his leadership so far.

他面临迄今为止对自己的领导工作最严峻的考验。

《牛津词典》

A reporter for United Press International called the FBI and asked them for the names of the "toughest guys" that the agency wanted to capture.

VOA: special.2010.05.05

That has to count as the toughest day, not only in my career, but also in the history of that particular presidency.

那可以算得上是最艰难的一天，不仅在我的职业生涯里，在总统任期的历史中,也是最艰难的一天吧。

普林斯顿公开课 - 国际座谈会课程节选

What was the most difficult day for you as Chief of Staff and the most joyous day, and the toughest assignment President Bush gave you?

作为白宫办公厅主任,最艰难的一天是哪天,最高兴的又是哪天，还有布什总统派给你的,最难的任务是什么？

普林斯顿公开课 - 国际座谈会课程节选

Correspondents say this is the International Atomic Energy Agency's toughest report on Iran to date.

BBC: UN nuclear agency IAEA: Iran 'studying nuclear weapons'

There are great returns to be made in retail, but it is the toughest asset class.

FORBES: China Is Poised To Top Japan, Australia Among Int'l Commercial Property Investors In Asia

The toughest nut to crack here is the role of government in providing health care.

FORBES: What's a politician to do?