起立英文翻译为：stand up。

stand up：站;立;站立;起立;站起来;（要求或证据）经得起检验，能够成立;（男友或女友）爽约，放…的鸽子

Class, please stand up. Hello, class.

同学们，请起立。大家好，同学们。

The school made it a rule that the students should stand up when class begins.

学校定了一条规则，开始上课时学生要起立。

Stand up when the teacher comes in!

教师进来时要起立！

Hey, you want to play stand up, sit down again?

嗨，又想玩坐下起立的游戏？