A simple ticker-timer, which can be used to study the straight line motion and the mechanical vibration, is made using transfusion set.

用废弃的输液器制作了简易的“打点计时器”，可以在课堂上分析、判断直线运动以及研究机械振动。

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Then it will cancel the ticker, start a timer to display the tooltip, and transition to display State.

然后，它取消断续器，启动一个计时器来显示工具提示，并转换到Display状态。

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Or, when a timeout event occurs, you will cancel any timer that might be running, create the tooltip with an initial opacity of zero, start a ticker, and transition to FadeIn state.

当发生timeout事件时，将取消任何正在运行的计时器，创建一个初始不透明度为0的工具提示，启动一个断续器，并转换到FadeIn状态。

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