switch

Flip the light switch by the door to illuminate the dark hallway.

(Chinese) 按下门边的电灯开关，照亮黑暗的走廊。

Check the emergency cutoff switch if the heavy machinery fails to stop immediately.

(Chinese) 如果重型机械没有立即停止，请检查紧急切断开关。

We decided to switch our phone service provider to get a more reliable signal in rural areas.

(Chinese) 我们决定更换电话服务运营商，以便在农村地区获得更可靠的信号。

He had to switch his major from chemistry to biology after realizing his interest lay in genetics.

(Chinese) 在意识到自己的兴趣在于遗传学后，他不得不将专业从化学转为生物。