保安立刻上前阻拦他进入会议室。

Bǎo'ān lìkè shàngqián zǔlán tā jìnrù huìyìshì.

The security guard immediately stepped forward to stop him from entering the meeting room.

警方设置路障，阻拦可疑车辆进入市中心。

Jǐngfāng shèzhì lùzhàng, zǔlán kěyí chēliàng jìnrù shìzhōngxīn.

The police set up roadblocks to stop suspicious vehicles from entering the city center.