请起立用英语怎么说一年级视频

"Please stand up" is how you say "请起立" in English. This phrase is commonly used in classrooms or other settings where a group of people are sitting and need to be prompted to stand up. This phrase is also commonly used in military or other formal setting.
Examples:
"Please stand up for the national anthem."
("请起立，唱国歌。")
"Please stand up and give a round of applause."
("请起立，鼓掌。")