She didn't leave school until the rain stopped.

补充：She didn't leave school until the rain stopped.Here "until" means "before",that is to say,"She didn't leave school before the rain stopped",or after the rain stopped,she left the school.
翻译：直到雨停了她才离开学校.（或者：在雨没有停之前,她没有离开学校.）
这句用的是not...until...这一结构,表示“直到...才...”,until 表示“直到...,在...之前”.

She didn't leave school until the rain stopped
直到雨停了，她才离开学校
not...until ...直到。。。才。。。

她直到雨停了才离开学校。NOT .until否定在前，翻译的时候要注意哦～