Instead, for most people, it switches on and off like a light switch.

相反，对于大多数人来说，它就像开关一盏灯一样。

youdao

If you only love on and off, like a light switch, you're not loving like God wants you to love.

如果你的爱只是一开一关，像一盏灯的开关，那么你就不是如上帝说的那样去爱。

youdao

So, very crudely, the thing on the wall is the switch DNA, your finger is the regulator, and gene expression is the light turning on or turning off.

因此，大体上可以这么形容，在墙上的东西就是开关DNA，手指是调控器，基因表达就是打开灯或关闭灯。

youdao

In 2002 MIT professors started a not-for-profit called BioBricks that has collected 2, 000 biological components, including gene sequences that sense light, produce light, send messages between cells and switch cell functions on and off.

FORBES: Architect of Life

Local communities supported the bid, with residents in Talybont-on-Usk holding their own Star Party and organising a community light switch off.

BBC: Brecon Beacons National Park wins dark sky status