on

on
preposition
  1. physically in contact with and supported by (a surface)
    在…上
    on the table was a water jug.
    桌上是一个水罐。
    she was lying on the floor.
    她躺在地板上。
    a sign on the front gate.
    前门上的一个记号。
    ■located somewhere in the general surface area of (a place)
    位于（某地）
    an internment camp on the island.
    岛上的一个俘虏收容所。
    the house on the corner.
    拐角上的房子。
    ■as a result of accidental physical contact with
    在…上
    one of the children had cut a foot on some glass.
    其中的一个孩子在玻璃上划伤了一只脚。
    he banged his head on a beam.
    他把头撞在了一根横梁上。
    ■supported by (a part of the body)
    靠在（身体的某部位）上
    he was lying on his back.
    他仰面躺着。
    ■on to
    到…上
    put it on the table.
    把它放到桌上。
    ■in the possession of (the person referred to)
    带在身上；拥有
    she only had a few pounds on her.
    她身上只有几个英镑。
  2. forming a distinctive or marked part of (the surface of something)
    …上（形成该表面独特或有记号的一部分）
    a scratch on her arm.
    她手臂上的一道抓痕。
    a smile on her face.
    她脸上的笑容。
  3. having (the thing mentioned) as a topic
    关于；涉及
    a book on careers.
    一本关于事业的书。
    essays on a wide range of issues.
    涉及广泛问题的短文。
    ■having (the thing mentioned) as a basis
    以…为基础
    modeled on the Act of 1954.
    以1954年法案为基础效仿的。
    dependent on availability.
    依赖于可用性。
  4. as a member of (a committee, jury, or other body)
    作为（委员会、陪审团等）成员
    they would be allowed to serve on committees.
    他们将被允许成为委员会成员。
  5. having (the place or thing mentioned) as a target
    以…为目标； 向…
    five air raids on Schweinfurt.
    以施韦因福特为目标的5次空袭。
    thousands marching on Washington.
    向华盛顿进发的成千上万的人。
    ■ having (the thing mentioned) as a target for visual focus
    （目光集中）在…上
    her eyes were fixed on his dark profile.
    她的目光集中在他阴暗的侧面上。
  6. (often followed by a noun without a determiner) having (the thing mentioned) as a medium for transmitting or storing information
    以…为（传输或储存）中介
    put your ideas down on paper.
    把你的想法写在纸上。
    stored on the client's own computer.
    储存在客户自己的电脑里。
    ■being broadcast by (a radio or television channel)
    由（电台或电视频道）播放
    a new 12-part TV series on Channel 4.
    4频道播放的一部新的12集电视连续剧。
  7. in the course of (a journey)
    在（旅行）途中
    he was on his way to see his mother.
    他在去看望母亲的路上。
    ■while travelling in (a public service vehicle)
    在（公共交通工具）上
    John got some sleep on the plane.
    约翰在飞机上睡了一会儿。
    ■on to (a public vehicle) with the intention of travelling in it
    上（公共交通工具）
    we got on the train.
    我们上了火车。
  8. indicating the day or part of a day during which an event takes place
    在（某天或某时段）
    reported on September 26.
    在9月26日发出的报道。
    on a very hot evening in July.
    在7月的一个非常炎热的晚上。
    ■at the time of
    在…时
    she was booed on arriving home.
    她回到家时遭到了嘲笑。
  9. engaged in
    忙碌于
    his attendant was out on errands.
    他的助手出去办事了。
  10. regularly taking (a drug or medicine)
    靠，（经常）服用（药物）
    he is on morphine to relieve the pain.
    他靠吗啡来缓解疼痛。
  11. paid for by
    由…支付
    the drinks are on me.
    喝的酒由我付帐。
  12. added to
    增加
    a few pence on the electricity bill is nothing compared with your security.
    跟你的安全相比，电费单上多几分钱根本不算什么。
adverb
  1. physically in contact with and supported by a surface
    在上面
    make sure the lid is on.
    确定盖子在上面。
    ■(of clothing) being worn by a person
    （衣服）穿在身上
    sitting with her coat on.
    穿着大衣坐着。
    get your shoes on.
    把鞋穿上。
  2. indicating continuation of a movement or action
    继续着
    she burbled on.
    她滔滔不绝地说下去。
    he drove on.
    他继续开车。
    and so on.
    等等。
    ■further forward; in an advanced state
    向前；前进中
    later on.
    后来。
    time's getting on.
    时间渐晚。
  3. (of an entertainment or other event) taking place or being presented
    （娱乐演出等）上演；进行中
    what's on at the May Festival.
    5月节的时候上演什么。
    there's a good film on this afternoon.
    今天下午有一场精彩的电影上演。
    ■due to take place as planned
    （按计划）应发生
    the reorganization is still on.
    重组仍在按计划进行。
  4. (of an electrical appliance or power supply) functioning
    （电器或电力供应）开着的
    they always left the lights on.
    他们总是让灯开着。
    ■(of an actor) on stage
    （演员）在台上
    ■(of an employee) on duty
    （员工）当班
noun
  1. (亦作on side)(Cricket)the leg side
    (板球)符合规则的位置
常用词组
be on about
  1. (Brit. informal)talk about tediously and at length
    (英，非正式)滔滔不绝地谈
    she's always on about doing one's duty.
    她总是滔滔不绝地谈尽义务。
be on at someone
  1. (Brit. informal)nag or grumble at someone
    (英，非正式)对某人不断唠叨
be on to someone
  1. (informal)be close to discovering the truth about an illegal or undesirable activity that someone is engaging in
    (非正式)几乎发现某人的非法行径
be on to something
  1. (informal)have an idea or information that is likely to lead to an important discovery
    (非正式)（对重要发现）有头绪
it's not on
  1. (informal)it's impractical or unacceptable
    (非正式)这是不实际（或无法接受）的
on and off
  1. intermittently
    断断续续地
    it rained on and off most of the afternoon.
    下午大部分时间都在断断续续地下雨。
on and on
  1. continually; at tedious length
    不断地；持续地
    he went on and on about his grandad's trombone.
    他一直不断地说着他爷爷的长号。
on it
  1. (Austral. informal)drinking heavily
    (澳，非正式)大量喝酒
on side
  1. supporting or part of the same team as aomeome else
    支持
on to
  1. moving to a location on (the surface of something)
    （移动到）…上
    they went up on to the ridge.
    他们爬上了屋脊。
  2. 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.
    我们上了火车。
what are you on?
  1. (informal)said to express incredulity at someone's behaviour, with the implication that they must be under the influence of drugs
    (非正式)（表示惊奇）你吃错药啦？
you're on
  1. (informal)said by way of accepting a challenge or bet
    (非正式)一言为定
语源
  1. Old English on, an, of Germanic origin; related to Dutch aan and German an, from an Indo-European root shared by Greek ana
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