由顶层起动时，驱动机芯开关跳掣的操作音量颇大。
The operation of the powertrain relay switchbox on startup from the top floor is rather loud.
由微小硅片制成的电子计算机芯片现在通常包含数百万个电子开关。
Electronic computer chips made of tiny silicon wafers now regularly contain millions of electronic switches.
片段当中的风扇在上行时用那个红色的新开关掣关掉，以便聆听驱动机芯，但声音不算真的可以听到。
In the video the fan is switched off while travelling upwards with the new red switch to allow hearing of the propulsion motor but the sound is not really audible.
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