the act of moving people to somewhere safe inside a building, when there is danger outside or in another part of the building

Would you know how to carry out an invacuation or lockdown? 你知道如何进行室内紧急转移或封锁措施吗？

Pupils will not be released to parents during invacuation. 在室内紧急转移期间，学生不会被交给父母。