line of defence造句

1、Install a burglar alarm if you can afford it as another line of defence against intruders.
如果你能负担的话，安装一个防盗报警器作为对入侵者的另一层防御。

2、Residents have the responsibility of being the first line of defence against wildfires.
居民有责任成为野火的首要防卫人员。

3、Password is the first line of defence of network system.
口令是网络系统的第一道防线。