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When that doesn't work they sometimes have the sense to seek help.

当那样做行不通时，他们会想到时不时地去寻求帮助。

《柯林斯英汉双解大词典》

I think it is enjoyable, though I sometimes have some trouble in study.

我认为这是十分愉快的，虽然我有时在学习上有一些困难。

youdao

Large ships that travel to the area sometimes have accidents resulting in leaks of gasoline or oil.

VOA: special.2009.06.03

I sometimes have trouble with students who talk very softly which is alright in itself and sometimes very sweet.

有时候有些同学说话轻声轻语,这样说话本身没什么,但我却有时听不太明白。

麻省理工公开课 - 电影哲学课程节选

And so, and so those, those people sometimes have a harder time, it seems.

所以，这些，这些人有时候就比较有困难了，似乎是这样。

对于赞助入学的看法 - SpeakingMax英语口语达人

How do you run a company with three businesses that sometimes have conflicting interests?

FORBES: Supervalu's Elusive Growth Strategy

Smartphone launches sometimes have to build up steam before they can go full speed ahead.

ENGADGET: ComScore: iPhone up to 35 percent of US smartphone share in November, Android steady

Now I'm in so many meetings I sometimes have to step out and catch a breath.

FORBES: Magazine Article