The system was so sophisticated that it employed microwaves and millimeter waves and was transportable by a large truck.

这个系统是如此的复杂，它使用了微波、毫米波，并能通过大的卡车传输。

youdao

The camera currently takes 30 images per second by transmitting millimeter and microwaves to a "collector" on the other side of a subject, and then sends them to a laptop for real-time inspection.

ENGADGET: Handheld millimeter / microwave camera to see through walls, your underpants (video)