\"大众in time\"大众 means early enough. The opposite of in time is too late. (比操持的韶光点更早的一段韶光，反义是太迟了)
on time 例句
The plane took off on time.
飞机定时起飞。
I hope the meeting starts on time.
我希望会议定时开始。
I arrive at 4:00 PM, I am on time for the interview.
我下午4点到达，我定时参加口试。
in time 例句
We got to the airport in time to have a coffee before checking in.
我们及时赶到机场，在办理登机手续前喝了杯咖啡。
We'll have to hurry if we want to be in time for the show. 如果我们想遇上演出，就得快点。
I was about to close the door when just in time I remember my key. (at the last moment)
我正要关门，溘然我记起了我的钥匙。(在末了一刻)
