seal in

1. 保存

Cook the meat quickly at first to seal in the juices.

肉先快煮, 可保存肉汁。

seal off

1. 封锁

Police sealed the area off where the murderer was known to be hiding.

警察把凶手藏匿的地区封锁了。

set the seal on

1. 使确定下来

The experience set the seal on their friendship.

这一经历确定了他们的友谊。