取样系统用可调程序定时器或手动操作的按纽控制。
The sampling system is controlled by an adjustable program timer or by a manual pushbutton.
只要单击鼠标器按纽，指针所在的命令就会有高亮显示。
Just click the mouse Button, and the command with the pointer over it Becomes highlighted.
随后电梯开始向下坠，越来越快，直到有人压下紧急制动按纽。
The lift then began to fall faster and faster until someone hit the emergency stop button.
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