After the fun he's had during the holidays, the boy can't concentrate on his school work.

You should concentrate on the road when you're driving.

开车时注意力应集中在路上.

You should concentrate on your work.

你应该专心于你的工作.

But when they feel tired and bored, students can't concentrate on studies.

但是当学生疲倦腻烦时, 就不能集中精神学习.

Thus, they can concentrate on schoolwork and their families.

因此, 他们可以更专注于学校的学业和家庭生活.

Tired, sleepy, boring and weakness and fatigue and rest to concentrate on it!

累了, 困了, 没劲了,乏力了,疲劳了,专心地休息吧!

We insist that only professional, to concentrate on in order to enable customers peace of mind.

我们坚持只有专业 、 专心才能使客户安心.

I can't concentrate on any work.

不能集中精力工作.

Back at home, I keep thinking of that boy; I cant concentrate on my teachers lecture.

在家, 我一直想着那个男孩, 所以无法专心在功课上.

Concentrate on selling them well.

集中出售.

I wish you'd concentrate on what I'm saying.

但愿你能集中注意力听我讲.

We should not just concentrate on one thing to the neglect of everything else.

不能只抓一头,把别的事都撇在一旁.

I think we should concentrate on one or two of the really big tournaments.

我想我们应该专攻一两项大比赛.

In a brief statement, he concentrated entirely on international affairs.

他作了一个简短的声明，集中阐述了在国际事务方面的立场。

Taste buds are concentrated at the tip and rear of the tongue and around its periphery.

味蕾集中于舌尖、舌根和舌头两侧。

The decor was meant to keep the mind concentrated on the making of money.

这样的装饰布局原本是想让人们把注意力集中在如何赚钱上。

Most development has been concentrated in and around cities.

土地开发主要集中在城市及周边地区。

She concentrated on the good parts of her trip instead of harping on about the bad.

她着重说了自己旅途中遇到的开心事，并没有唠叨那些不愉快的事。

They feinted and concentrated forces against the most fortified line of the enemy side.

他们虚晃一招，然后集中兵力攻打敌方最坚固的阵线。

He made a concentrated effort to finish the work on time.

他全力以赴以按时完成这项工作。

When the enemy's ships are all concentrated at the entrance to the harbor, it must mean trouble.

当敌人的船只都集结在港口时, 这肯定意味着要出事了.