One thing that can hold joy back is a person's concentration on avoiding failure rather than their looking forward to doing something well.

有一件事会抑制快乐，那就是一个人专注于避免失败，而不是期待把事情做好。

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The focus and concentration on one task at a time pays dividends in faster and better quality writing.

在某个时间，专心致志的去写文章，就会写的比较快，文字质量也会很高。

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He once described the future as "the rapids" -traversable terrain that required intense concentration on the task in hand.

它将所能看到的未来称作“湍流”——这个遍历的过程需要将精力高度集中在手头的任务上。

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Paul Pillar,a former senior CIA intelligence officer now with Georgetown University's School of Foreign Service, favors a shift away from direct combat operations to a concentration on training Afghanistan's army and police, and economic development.

VOA: standard.2009.10.15

The structural moment of concentration on the code for its own sake cannot be avoided, and literature necessarily breeds its own formalism.

集中在代码上的结构瞬间,因为它本身的原因不可避免，文学必要地导致了它自身的形式主义。

耶鲁公开课 - 文学理论导论课程节选

So, this is several months and this logarithmic scale on the Y-axis represents antibody concentration.

这是在几个月内,这里使用的是对数刻度,Y轴代表的是抗体的浓度

耶鲁公开课 - 生物医学工程探索课程节选

David gathered himself in a great effort of concentration on the children, his younger children.

NEWYORKER: The Swan

In part, this is because of its concentration on selling basic foodstuffs, which are largely recession-proof.

ECONOMIST: Smaller South Korean firms

The Conservative concentration on tax cuts shows that, for them, the poor are just the losers.

BBC: Don't forget the don't-care vote