When working, one should concentrate and not allow oneself to be distracted.

工作时要集中精力， 不要分心。

《新英汉大辞典》

It's easy to be distracted and let your attention wander.

很容易走神分散了注意力。

《牛津词典》

He refused to be distracted.

他拒绝被分心。

article.yeeyan.org

Participating teams, in the meantime, are trying to focus on football, and hoping not to be distracted by the environment off the field.

VOA: standard.2009.10.22

Now, don't be distracted by the fact that they already appear to be sorted.

现在，貌似它们是有序的,但不要被这一事实干扰。

哈佛公开课 - 计算机科学课程节选

The European Union, with ten new members to absorb, is also going to be distracted.

ECONOMIST: World trade talks

With Nolte to rely on, why does Jordan allow his attention to be distracted by lesser figures?

NEWYORKER: The Good Thief

She didn't want to be distracted by news of Rupert Murdoch's News Corp. and EchoStar fighting over her company.

FORBES: Eye of the Storm