Once sealed, it became a Faraday cage, and no electronic signals could escape.

一旦密封，这个房间就成了一个法拉第笼子，任何电磁波都无法传出去。

youdao

Borders once sealed by minefields are now just lines on the map.

ECONOMIST: The world after 1989

Sanchez broke Massu's serve five times in the final and lost his own only once, and sealed victory by winning the last five games of the match.

BBC: Sanchez lands second title

He proved pivotal once again as Motherwell sealed victory with a third goal.

BBC: Sport - St Johnstone 0-3 Motherwell