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1·In order to help those students who fall behind other classmates, our teacher Paul is burnt out from weeks of overworking and stress.

为了帮助落后于其他同学的学生，我们的老师保罗因为连续几周的过度辛劳和压力而累垮了。

2·Contractors who fall behind schedule incur heavy financial penalties.

承包商如延误工期将被处以巨额罚款。《牛津词典》

3·I'm afraid I'll fall behind them.

我怕我会落后他们。

4·I don't want my students to fall behind the times.

我不希望我的学生落后于时代。

5·Never be satisfied with yourself, or you will fall behind others.

永远不要自我满足，否则你会落后于别人。

6·If you're a slow learner, you can fall behind in regular school.

如果你学得慢，那你在正规学校可能会落后。

7·You will fall behind others if you are crazy about playing computer games.

如果你沉迷于电脑游戏，你会落后于别人。

8·Mrs. Luo finds the new method can let students not fall behind times.

罗老师发现这个新方法可以让学生不落后于时代。

9·In my opinion, the relevant authorities should pay attention to it and shouldn't fall behind.

在我看来，有关部门应提高警惕，不能落后。

10·If we do not study hard, sooner or later, we will fall behind the other students.

如果我们不努力学习，我们迟早会落后于其他同学。

落后

1·Modesty helps one go forward while pride makes one fall behind.

谦虚使人前进，骄傲让人落后。

2·Many Chinese mothers are afraid that their children will fall behind their classmates, so these mothers are becoming tiger mothers.

许多中国妈妈担心自己的孩子会落后于同班同学，所以这些妈妈就变成了“虎妈”。

3·Put on a spurt, or you'll fall behind.

加把劲，不然你要落后了。《新英汉大辞典》

4·So why did we fall behind?

那么为什么我们落后了呢？

5·Often we waste our time through frivolous activities, and the poor management of our business makes us fall behind even without our noticing.

我们经常会把时间浪费在一些琐碎的事情上，在不知不觉中对事业的疏于管理使得我们落后于人。

掉队

1·If you stand still, you'll quickly fall behind.

如果你停滞不前，你很快就会掉队。

2·She urges parents to read to children from an early age so they do not fall behind in school.

她督促家长在孩子年幼时培养他们阅读，以便让他们在学校中不会掉队。

3·Boots of course would not fall behind, pulled the fur to do an ornament.

靴子当然不肯掉队，拉了皮毛来做点缀。

4·Try to catch up with him, or you will fall behind.

设法要赶上他，不然就会掉队。