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- The ability or power to concentrate mentally. 注意力精力集中的能力或力量
- In developed capitalist countries,the job of a good number of workers is just to stand and press buttons for hours on end. This is intense and concentrated mental labour as well as toilsome manual labour. 发达的资本主义国家有许多工人的工作就是按电钮，一站好几小时，这既是紧张的、聚精会神的脑力劳动，也是辛苦的体力劳动。
- In developed capitalist countries, the job of a good number of workers is just to stand and press buttons for hours on end. This is intense and concentrated mental labour as well as toilsome manual labour. 发达的资本主义国家有许多工人的工作就是按电钮，一站好几小时，这既是紧张的、聚精会神的脑力劳动，也是辛苦的体力劳动。
- He winced mentally at the terrible news. 听到这个噩耗，他不由的心里一楞。
- It's too hot to concentrate on book. 热得不能集中心思看书。
- I must concentrate my energies on decorating today. 我今天必须集中精力搞装饰。
- A mentally challenging problem or puzzle. 脑筋急转弯一个考验智力的问题或难题
- He wasn't rid of the mental burden. 他摆脱不了精神负担。
- I can't concentrate on my work when I'm tired. 我累了就无法集中精力工作。
- Her younger daughter was mentally retarded. 她的幼女是一个弱智儿童。
- He's suffering from severe mental disorder. 他患有严重的精神病。
- Don't put me off when I'm trying to concentrate. 我正要集中注意力呢，别打搅我。
- We must concentrate our attention on efficiency. 我们必须把注意力集中在效率上。
- Not physically or mentally healthy. 不健康的体格或精神上不健康的
- She couldn't concentrate on a book very long. 她不能长时间专心读一本书。
- Physical disability causes mental anguish. 生理伤残会引起心理苦闷。
- I must concentrate upon my work now. 我现在必须集中精力工作。
- He has a mental block about maths. 他一遇到数学问题就糊涂。
- One that is physically or mentally deficient. 有缺陷的人身心不健全的人
- We should pay more attention to our mental health. 我们应该更注重心理健康。
