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1·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。

2·He kept pumping my hand up and down.

他不停地摇动着我的手。《牛津词典》

3·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》

4·She led the girl by the hand up to a broad gateway.

她拉着姑娘的手，领她来到一扇宽大的门前。

5·She held up her hand stiffly.

她僵硬地举起手来。《柯林斯英汉双解大词典》

6·Put your hand up if you need more paper.

若有人还要纸，请举手。《牛津词典》

7·Put your hand up if you know the answer.

知道答案就举手。《牛津词典》

8·Her eyes flashed, but he held up a hand. Let me finish.

她的眼睛一闪，但是他举起一只手说：“让我说完。”《柯林斯英汉双解大词典》

9·I stretched out a hand and picked up the book.

我伸出一只手，把书捡起来。《牛津词典》

10·Time's up. Stop writing and hand in your papers.

时间到了。不要再写了，把试卷交上来。《牛津词典》