基本释义
相关例句
3.A floating structure used to close off the entrance to a dock or canal lock.
4.Mexican troops close off a Tijuana hospital to protect suspected drug traffickers wounded in gang warfare.
5.A movable structure used to close off an entrance, typically consisting of a panel that swings on hinges or that slides or rotates.
6.It can retain water all the day, close off ultraviolet radiation and atomy in the air, control melanin forming, prevent oxidation and make skin white and soft.

