hand up 意思是上交、呈上的意思。
hand up
英 [hænd ʌp] 美 [hænd ʌp]
上交；呈上；把…扶上去。
1、He would try to grope her breasts and put his hand up her skirt.。
他会试图摸她的胸部，还把手从她的裙子上向上移。
2、He put one hand up to his frozen face 。
他用一只手捂在冰冷的脸上。
3、If you know the answer, put your hand up, don't call out。
假如你知道答案就举手，不要大声嚷嚷。
4、Put your hand up when you got the answer。
有答案了就举手。
5、And I had my hand up with lots of other people, and you took two more questions。
我和其他一些人举起手，你回答了2个以上问题。