You will need strong mental concentration to finish the course.

你需要强壮的精神集中力去完成这个跑道。

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Interpreting simultaneously requires a great deal of mental concentration and agility.

同声传译需要高度的集中和灵活性。

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Even mild dehydration can take a toll, decreasing alertness and mental concentration, and contributing to fatigue.

即使是轻微脱水也会造成不利影响，降低警觉性和注意力，导致疲倦。

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Lyrica causes side-effects in some patients, including problems with mental concentration and attention.

VOA: special.2011.08.02

This takes a great deal of physical energy, as well as a great deal of mental concentration.

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The earlier children are introduced to these teachings, he believes, the sooner they will acquire mental maturity, improved concentration and stronger moral standards, such as filial piety and respect for teachers and elders.

CNN: Confucius is seen as a beacon in a changing world

In truth, Jankovic's final steps to victory had more to do with the 12-time Grand Slam champion's lack of concentration than her own mental fortitude.

BBC: Jelena Jankovic beats Serena Williams in Rome