律师发现合同中的漏洞后，为客户争取到了更有利的条件。

The lawyer found a ___loophole in the contract and secured better terms for the client.

古代要塞城墙上的射击孔让士兵可以安全地向敌人射箭。

The ancient fortress walls had small ___loopholes for soldiers to safely shoot arrows at enemies.