早期的设想是用计算器来计算包括截止阀和换色涂抹装置在内的仪器，然而这项设计最终才用了自动弹跳机理结构，原因是易于操作。

Early ideas to counter these issues included cut-off valves and colour-changing paint, but the designer settled on the pop-up mechanism, because of its ease of use.

youdao

早期的设想是用计算器来计算包括截止阀和换色涂抹装置在内的仪器，然而这项设计最终才用了自动弹跳机理结构，原因是易于操作。

Early ideas to counter these issues included cut-off valves and colour-changing paint, but the designer settled on the pop-up mechanism, because of its ease of use.

youdao