I had to go below ground to an office where I spoke to a policeman.

我走到了地下的一间办公室才和一个警察说上话。

One theory is that it is a spy plane, designed to catch savvy targets that know how to go to ground when spy satellites—which have predictable orbits—are overhead.

有一种说法是X-37是一架间谍飞机，旨在捕获各种精明的目标，这些精明的目标发现间谍卫星（有可预见的轨道）位临上空时，能够知道如何隐蔽自己。

Coman appeared to go to ground a little too easily but the replays did show that Kehrer had clipped his heel, as well as putting a hand on his shoulder.

科曼似乎太容易倒地了， 但回放确实显示科曼踩到了他的脚后跟， 并将一只手放在了他的肩膀上。