The invention relates to a teaching aid for communication between teacher and students: hand-up device.

本发明涉及一种用于师生之间通信的教具：手动装置。

youdao

He kept pumping my hand up and down.

他不停地摇动着我的手。

《牛津词典》

He put one hand up to his frozen face.

他抬起一只手放在他冻僵的脸上。

《柯林斯英汉双解大词典》

MCC Director Irene Paxia grew up in Italy, and knows first-hand how language barriers can waste precious time in emergencies.

VOA: standard.2010.07.22

and holding the pen in the same hand in the close-up,

那么，在近距离拍摄的时候也应该是用右手拿笔，

制作电视节目 - SpeakingMax英语口语达人

People have referred to this as a J shaped curve with this little up tick in the left hand side and people--some people have sort of said, well maybe it's not so bad to be overweight because it's not so good to be underweight as well and that's a problem.

人们把这称为J形曲线,最左边有一个向上的弯钩,因此就有人说,也许超重也不一定就是一件坏事,因为体重过轻也不是什么好事,这是个问题

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The government can't tell you what to name your child, your employers or extended family can't force your hand -- coming up with a name is a parent's first and biggest choice.

CNN: Where have you gone Nancy and Joe?

The Russian, sometimes out of sorts in recent weeks, was seeing plenty of the ball on the left-hand side up against Hunt, a 20-year-old right-back making his first Huddersfield start.

BBC: Arsenal 2-1 Huddersfield

This young man right here -- who had their hand up right -- right here, this gentleman.

WHITEHOUSE: Building a Clean Energy Economy