They were laying a trap for the kidnapper.是什么意思？

They were laying a trap for the kidnapper.

他们设下一个圈套引绑匪上钩。

they

pron. 他/她/它们，人们，大家，政府，当局，她们；

例句
The storms had abated by the time they rounded Cape Horn.
他们绕过合恩角时，暴风雨已经减弱。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

laying

n. 产卵数，瞄准；v. 打赌( lay的现在分词 )，提出，放置，铺；

例句
The caterers were already laying out the tables for lunch.
负责餐饮的人已经在为午餐摆桌了。

trap

vt. 诱骗，使受限制，困住，使（水与气体等）分离；n. 圈套，（对付人的）计谋，（练习射击用的）抛靶器，（捕捉动物的）夹子；vi. 设陷阱，装捕捉机，设圈套；

例句
This landscape seemed to trap and amplify sounds...
这种地貌好像可以笼住并放大声音。

for

prep. 为，为了，倾向于，关于，当作；conj. 因为，由于；

例句
I've come looking for a bit of advice.
我特来讨教。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

kidnapper

n. 拐子，绑匪；

例句
Her kidnapper extorted a £75,000 ransom for her release.
绑架者索要75,000英镑赎金才肯放她。