2 sentences for 把关 (bǎ​guān)

1. 战士们日夜在要塞守卫把关。

   zhàn​shì men rì​yè zài yào​sài shǒu​wèi bǎ​guān.

   The soldiers guard the fortress day and night.

   Source: Dong Chinese Dictionary

2. 主编会对所有稿件进行严格把关。

   zhǔ​biān huì duì suǒ​yǒu gǎo​jiàn jìn​xíng yán​gé bǎ​guān.

   The editor-in-chief will strictly screen all manuscripts.

   Source: Dong Chinese Dictionary