close off

动词 close off:

1. stem the flow of
   同义词：shut off
2. isolate or separate
   同义词：shut off
3. block off the passage through
   同义词：shut off, block off

1. A section of a waterway, such as a canal, closed off with gates, in which vessels in transit are raised or lowered by raising or lowering the water level of that section.
   水闸用门关住的水道的一部分，如运河。其中通过升高或降低这部分的水位可以抬升或压低运输中的船只
2. A movable structure used to close off an entrance, typically consisting of a panel that swings on hinges or that slides or rotates.
   门一种用于关闭入口活动装置，典型的由一块板上有铰链转动或为拉动式或为旋转式的组合