您要查找的是不是：
- It's too hot to concentrate on book. 热得不能集中心思看书。
- Don't put me off when I'm trying to concentrate. 我正要集中注意力呢，别打搅我。
- She felt ill. She went to work, however, and tried to concentrate. 她病了。然而她照旧去上班，并且尽力集中精神工作。
- Tom finds it difficult to concentrate. 汤姆发现很难集中注意力。
- Having failed my French exams, I decided to concentrate on science subjects. 我因法语考试不及格而决心专攻理科。
- He wanted to concentrate on a single issue. 他要集中在单一的问题上。
- A convex lens is used to concentrate rays of light. 凸透镜用于聚集光线。
- A planoconvex lens used to concentrate light. 凸透镜用来聚光的凸镜
- He would do well to concentrate more on his work. 他最好还是更加集中精力在工作上。
- He tried to concentrate on Thomson. 他尽力把注意力集中到汤姆森身上。
- Don' t put me off when I' m trying to concentrate. 我正要集中注意力呢; 别打搅我.
- He tried to concentrate his attention on his chemical experiment. 他试图把注意力集中到他的化学试验上.
- To concentrate efforts on one part of the game. 特长,在某一方面特别突出。
- I'm trying to concentrate on my job right now. 我现在正试着要专心工作。
- We need to concentrate on the matter in hand. 我们需要关注手头的这件事情。
- I tried to concentrate my attention on my chemical research. 我试图专心于化学研究。
- He scrunched up his face, trying to concentrate. 他皱起眉头努力集中精神。
- We also have to concentrate on the FA Cup final. 另外，我们还必须集中精力于足总杯决赛。”
- I tried to concentrate my attention on my academic researches. 我尽量把注意力集中到学术研究上去。
- To concentrate(one's interests) upon oneself. 使内向使对自己发生兴趣
