佩尼·亚菲耶尔解释称，由于一部电梯的寿命在25年左右，我们大可以认为，就算大多数电梯的“关门”键都是不起作用的，但“开门”按键是有效的。

Penafiel explains since an elevator's lifespan is around 25 years, it is safe to say that a majority, if any, do not have a functioning 'close' button but the 'open' button works when it is pushed.

youdao

佩尼·亚菲耶尔解释称，由于一部电梯的寿命在25年左右，我们大可以认为，就算大多数电梯的“关门”键都是不起作用的，但“开门”按键是有效的。

Penafiel explains since an elevator's lifespan is around 25 years, it is safe to say that a majority, if any, do not have a functioning 'close' button but the 'open' button works when it is pushed.

youdao