Also, the UML 1.x notation set was at times difficult to apply to larger applications.

同时，UML 1 . x符号集合有时难以适用于较大的应用程序。

youdao

Learning a new programming language can be a daunting task and at times difficult to know where to start.

学习一门新语言很容易让人焦躁，人们也往往不知从何处开始着手。

youdao

Friends are people who will stand by you through the difficult times.

朋友是那些在你困难的时候支持你的人。

youdao

And I feel like having dealt with adversity really helps me to lead a group of men through difficult times as well."

VOA: special.2010.06.02

So in retrospect, I think the way to deal with crisis, deal with challenge, deal with difficult times, is like this: First, you need to be realistic.

回首去年，我们应对危机，面对挑战时，所采取的方法就是：,首先，要变得现实一些。

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选

But it's difficult, because you have to go there like four or five times a week.

但是要坚持学习真实太难了，你一周得去四、五次。

I used to实战 - SpeakingMax英语口语达人

Earlier on in the debate, Mr Van Rompuy said the meeting was "at times difficult, but fruitful".

BBC: MEPs welcome summit outcome

These are obviously difficult times -- difficult economic times for the world and for Portugal.

WHITEHOUSE: President Obama Meets with Prime Minister Socrates

"In good times and difficult times people rely on us, " said co-owner Gary Mitchell, 55.

WSJ: Before Boston Bomb Suspect's Capture, a Day on Lockdown