A girl kept moving her hand. Looked like she was a pickpocket and would pass it to the person standing opposite her.
一个女孩的手不停地在动。看上去她是扒手，会把钱包传给对面站着的那个人。
The physics teacher now sets up a transverse wave on a long elastic cord by moving her hand up and down, as shown in the diagram below.
物理学教师现在让有弹性绳子的以横向波形式上下移动，如下面的图解中所示。
Esme was already moving; her hand touched an inconspicuous keypad on the wall, and with a groan, huge metal shutters began sealing up the glass wall.
艾思梅已经行动了起来，她的手按上墙上的一个隐藏着的按钮，然后，只听一声轻响，巨大的金属百叶窗开始降下来封闭住了玻璃墙。
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