Separating the base functionality from the thread-safety Collections.synchronizedMap allowed users who needed synchronization to have it, but users who didn't need it didn't have to pay for it.

通过将基本的功能从线程安全性中分离开来， Collections.synchronizedMap 允许需要同步的用户可以拥有同步，而不需要同步的用户则不必为同步付出代价。

youdao

In recent years, PSD is widely used to ensure operational safety by separating the tunnel and the station on the edge of the platform in constructing a new subway line or renewing the old line.

近年来，我国地铁的新线建设或旧线改造工程广泛采用在站台边缘设置站台屏蔽门，将隧道与车站分隔开以确保运营安全。

youdao

The only thing separating you from total disaster is a safety harness2... but are you really in danger?

唯一让你免于灾难的只有安全带……但是你真有那么危险吗？

youdao

By separating money from credit, you inject safety and soundness into the lending circuit.

FORBES: Dollarize Emerging Markets