设防

yī céng yī céng shè fáng

一层一层设防

set up defences in depth

zài yán hǎi dì qū shè fáng

在沿海地区设防

set up coastal defences

duì lái zì kōng zhōng de gōng jī shì méi fǎ shè fáng de

对来自空中的攻击是没法设防的。

There can be no real defence against attacks from the air.

wǒ men dū huì wú yì zhōng duì tā rén de qīn jìn yǒu suǒ shè fáng

我们都会无意中对他人的亲近有所设防。

We all unconsciously erect barriers against intimacy.