He is concentrating on his homework.

他正在集中注意力做作业。

She finds it hard concentrating in a noisy environment.

她发现很难在嘈杂的环境中集中注意力。

Concentrating on the task at hand is crucial for success.

集中注意力完成手头的任务对成功至关重要。

The teacher asked the students to stop talking and start concentrating.

老师要求学生们停止说话，开始集中注意力。

He was so concentrating on the game that he didn't hear the phone ring.

他集中注意力在游戏上，以至于没有听到电话铃响。

My mind was full of what had happened the night before, and I wasn't concentrating.

我满脑子都是前一天晚上发生的事情，没有集中注意力。

You have to concentrate, and keep concentrating.

你必须集中注意力，一直要集中。

Any problems concentrating in school lately?

最近上课能集中精神吗?。

Difficulty in concentrating or mind going blank

很难集中注意力或脑子一片空白

Having trouble concentrating or thinking clearly

无法集中精力或清楚的思考