American school children attend school five days a week as well.

Social scientists say the differences arise in part because low-income parents have less money to spend on music class or preschool, and less flexible schedules to take children to museums or attend school events.

社会科学工作者声称，差异存在的部分原因是，低收入家庭可以花在音乐课或学前班上的资金较少，日上的灵活性也较差，所以陪同孩子去博物馆或参加校园活动的机会也少。

We were glad to see the back of that circus; it was so noisy.

看到马戏团走了我们都很高兴, 他们太吵了.

Thanks be to God, it was a great day to see the back of them.

上帝保佑, 看看他们的下场那将是很伟大的一天.

I should be glad to see the back of him.

我真巴不得他快点走开.

She went there and back in two hours.

她往返只用了两个小时.

Can we go there and back before dinner?

晚饭以前我们能够去去再回 吗 ?

I took a taxi there and back.

我坐了一辆出租车往返.

It was 20 miles there and back.

来回一共20英里.

I can go there and back in half an hour.

我能在半小时内往返一次.

We have time go there and back before lunch.

我们到那里去一次,回来吃午饭还来得及.

They take the space shuttle , and go there and back.

他们坐宇宙飞船往返.

Can I go there and back in a day?

我一天内能打来回 吗 ?

Can I go there and back in one day?

我能够一天打来回吗？

You have enough time to go there and back before dinner.

你们到那里去了再回来吃晚饭还来得及.

We drive there and back on one tank of petrol.

我们开车到那里来回用了一油箱汽油.

It's one hell of a train trip, about five days there and back.

这趟旅行来回坐了大约5天火车，受的那个罪就别提了。

It takes four hours to go there and back.

往返要4个小时。

I want to go there and back on the same day.

我想一天就来回.

She had to cover her own mouth to keep back the cries.

她不得不捂住嘴,抑制住哭声.

The fireman told me to keep back.

消防队员要我站远点.