落后于

I was in retard of them in real knowledge.

我在实际知识方面落他们。

Britain's economic development must lag behind that of almost every other industrial nation.

英济发展肯定落几乎所有其他工业。

We are lagging far behind our European competitors in using new technology.

我们在使用新技术方面远远落我们欧洲手。

In this special field she is facile princeps, and has left all competitors behind.

在这一特定领域里她是出类拔萃, 并使所有竞争者都落她。

The building work is now behind schedule, but contractors are confident that they can make up for lost time.

这项建筑工程目前落定计划，但是承包人有信心把失去时间补回来。