be on about

(Brit. informal)talk about tediously and at length

(英，非正式)滔滔不絕地談

she's always on about doing one's duty.

她總是滔滔不絕地談盡義務(wù)。

be on at someone

(Brit. informal)nag or grumble at someone

(英，非正式)對(duì)某人不斷嘮叨

be on to someone

(informal)be close to discovering the truth about an illegal or undesirable activity that someone is engaging in

(非正式)幾乎發(fā)現(xiàn)某人的非法行徑

be on to something

(informal)have an idea or information that is likely to lead to an important discovery

(非正式)（對(duì)重要發(fā)現(xiàn)）有頭緒

it's not on

(informal)it's impractical or unacceptable

(非正式)這是不實(shí)際（或無(wú)法接受）的

on it

(Austral. informal)drinking heavily

(澳，非正式)大量喝酒

on side

supporting or part of the same team as aomeome else

支持

on to

moving to a location on (the surface of something)

（移動(dòng)到）…上

they went up on to the ridge.

他們爬上了屋脊。

moving aboard (a public service vehicle) with the intention of travelling in it

登上（公共交通工具）

we got on to the train.

我們上了火車。

what are you on?

(informal)said to express incredulity at someone's behaviour, with the implication that they must be under the influence of drugs

(非正式)（表示驚奇）你吃錯(cuò)藥啦？

you're on

(informal)said by way of accepting a challenge or bet

(非正式)一言為定

be on to&I{【俚語(yǔ)】}

To be aware of or have information about

知道，意識(shí)到：意識(shí)到…或知道…的情況

You'll never deceive us again; we're on to you.

你再也騙不了我們了；我們已識(shí)破了你的詭計(jì)

on and off

Intermittently.

間斷地，持續(xù)地

on and on

Without stopping; continuously.

無(wú)間斷地；連續(xù)不斷地