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1·We're going to be left behind by the rest of the world.

我们就要落后于世界的其他地区了。《柯林斯英汉双解大词典》

2·Unless these sectors make their business models much more efficient digitally, they might be left behind, says Chetan Dube, UneeQ's CEO.

UneeQ 的首席执行官切坦·杜布表示：“这些行业的商业模式要在数字化方面提高效率，否则可能会落后。”

3·Every student studied hard in order not to be left behind by other students.

为了不落后于其他同学，每个学生都努力学习。

4·Not to be left behind are the disease-spreading pests, about 100 species of which have become immune to a variety of insecticides now in use.

传播疾病的害虫也不甘落后，其中约有100种对目前使用的各种杀虫剂有了免疫力。

5·Everyone finds it necessary to update his knowledge, otherwise he will be left behind the society.

每个人都认为有必要更新自己的知识，否则将被社会抛在后面。

6·Heavier isotopes tend to be left behind when water evaporates from the ocean surfaces, the remaining ocean water becomes progressively enriched in oxygen 18.

当水从海洋表面蒸发时，往往会留下较重的同位素，所以剩余的海水会逐渐富含氧18这种同位素。

7·The empty shell of a snail or clam may be left behind, and if it is sufficiently durable and resistant to dissolution, it may remain basically unchanged for a long period of time.

蜗牛或蛤蜊的空壳可能会被留下来，如果足够持久和抗溶解，它可能会在很长一段时间内基本保持不变。

8·Why should Europe be left behind?

欧洲人为什么要落后呢？

9·If you don't listen, you will be left behind.

如果你没办法倾听，你将会被淘汰。

10·If you don't study hard, you'll be left behind.

你要是不努力学习，就会落在别人后面。