1.(放置、装置、固定)在顶上:
The lid is on tightly.
盖子盖紧了。
2.开着;燃着:
The light is on.
灯亮着。
3.【法律】(法庭审案、案件等)安排,被审理,被提出:
There is a case on in Courtroom No 1.
有案子在第1号法庭里审理。
4.发生;进行,举行:
This newspaper tells us what's on in and out of the country today.
这份报纸告诉我们今天国内外发生了什么事情。
5.放映;演出:
There's a new film on in the cinema this evening.
电影院里今晚放映一部新影片。
6.(戏剧)上演;(演员)登场;(球队队员)出场:
She is on next.
她下一个登台。
7.同意,同意参加某计划、活动等:
Shall we go for a walk?——OK,I'm on.
我们散散步好吗?——行,我同意。
8.上班;值班:
Two soldiers must be on guard all night.
两名战士必须通宵警戒。
9.参加,参与;就位,到位[亦作 be upon]:
He is on first base.
他在第一垒。
10.(经常)服药,用药[亦作 be upon]:
Father has been on that medicine for several days.
父亲几天来都在服用那种药。
11.由…支付[亦作 be upon]:
This meal is on me.
这顿饭由我付账。
12.【板球】(开始)投球:
Jack was on for three more overs.
杰克投了三次球。
13.(赛马)把…押下打赌;对…打赌[亦作 be upon]:
Their money is on Tolson to win the final race.
他们的钱都押在要赢得最后一轮比赛的托尔森的身上了。
14.留着:
The scars are still on me.
我身上仍留着疤痕。
15.使焦急,使烦恼:
That matter is always on my mind.
我对那件事总是放心不下。