turn on

1.打開；發動(水、電視、收音機、燈、煤氣等）

Will you turn onthe radio?

你打開收音機好嗎?

2.(使)興奮；感興趣

Many young people are taking drugs to turnon.

許多年輕人吸毒尋求刺激。

His normally placid dog turned on him and bit him in the leg.

他那條狗平日很溫順，這次突然發作咬了他的腿。