英语语法分析

It's hard to get attacks against the cloud infra-structure.

这种攻击对云基础设施很难奏效。

In the case of lidar, the waves are in the form of an infra-red laser beam.

至于激光雷达，电磁波是以红外激光束的形式发射的。

Quartz is simply infra dig, so keep that for your throwaway or unbreakable casual watch.

石英手表实在有失身份，所以只能暂时使用，或者是当作一种牢固的休闲手表来使。