Soldiers were soon at the scene and sealed off the area.

很快有军人抵达并封锁现场。

Troops sealed off the surrounding area.

【surrounding】军队封锁了周围地区。

Following a bomb warning, police have sealed off the whole area.

【seal】接到有炸弹的警告后，警方封锁了整个地区。

Extra care has been used in sealing essential areas against sand and dust.

在密封重要区域以防止沙子和灰尘方面格外小心。