当教师走进教室时，学生不必起立的翻译：When the teacher came into the classroom, students don't have to stand up to 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

When the teacher entered the classroom, students do not have to stand up

When the teacher came into the classroom, students don't have to stand up to

When the teacher enters the classroom, the student does not need to stand up

When a teacher at school, students do not have to stand up to

When the teacher came into the classroom, students don't have to stand up to