And that’s only half the battle: Once the waves bounce off any targets, they must pass back through the wall to reach the radar’s receivers — and again, 99 percent don’t make it.

并且这还只是整个进程的一半：一旦电波碰到目标物体反射，它们必须再次穿过墙壁返回雷达的接收器。

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And that’s only half the battle: Once the waves bounce off any targets, they must pass back through the wall to reach the radar’s receivers — and again, 99 percent don’t make it.

并且这还只是整个进程的一半：一旦电波碰到目标物体反射，它们必须再次穿过墙壁返回雷达的接收器。

youdao