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start button /ˈstɑːt ˈbʌtən/ n

中文：开始按钮

中文 · 开始按钮Español · botón de inicio de marchaFrançais · poussoir de mise en marche
Meaning：Knob that is pushed to start the stopwatch and measure the duration of a phenomenon or event.
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Found in these illustrated scenes（1）

Stopwatch

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