1. by compulsion : 强迫地；

2. upon compulsion : 被迫, 不得不；

1. John will take his medicine only by compulsion.
    只有对他用强制手段约翰才会服药。

2. compulsion在线翻译

2. They made the prisoners do the work by compulsion.
    他们强迫囚犯做工。

3. Drinking is a compulsion with him.
    喝酒是他克制不住的欲望。

4. 911查询·英语单词

4. She felt a sudden compulsion to hit him.
    她突然感到一种难以抗拒的冲动，想要揍他。

1. 强迫行为：(二)强迫行为(compulsion)重复某一行为、收集或收藏某些东西等等. 患者明明知道这样的想法很不合理、很不舒服,可是无法阻止这类思考的出现及盘据在脑海中,直到强迫思考自动消失后才能松一口气.

2. 脅迫：不过复原术可以恢复失去的点数. 许多能力和法术可以使人物和怪物的意识变的模糊,让他们处于敌我不分的状态--或更糟糕的是,诱使他们认为先前的朋友是目前最大的敌人. 两类能影响角色和动物的惑控效果是:魅惑(charm)和胁迫(compulsion).

1. 强烈欲望;(难以克制的)冲动
    A compulsion is a strong desire to do something, which you find difficult to control.

    e.g. He felt a sudden compulsion to drop the bucket and run...
           他突然有一种想扔掉水桶撒腿就跑的冲动。
    e.g. It''s a compulsion to write, more than talent, that makes a writer.
           成为作家要有天分，但更要有创作的冲动。

2. 强迫;强制
    If someone uses compulsion in order to get you to do something, they force you to do it, for example by threatening to punish you if you do not do it.

compulsion

    e.g. Many universities argued that students learned more when they were in classes out of choice rather than compulsion...
           很多大学认为如果学生上课是出于自愿而不是被迫，那么他们学到的东西会更多。
    e.g. There is already an element of compulsion in existing government schemes for the unemployed.
           政府现行的失业方案已经有点强制的意味了。

1. using force to cause something to occur

    e.g. though pressed into rugby under compulsion I began to enjoy the game
           they didn''t have to use coercion

    Synonym: coercion

2. an urge to do or say something that might be better left undone or unsaid

    e.g. he felt a compulsion to babble on about the accident

    Synonym: irresistible impulse

3. an irrational motive for performing trivial or repetitive actions, even against your will

    e.g. her compulsion to wash her hands repeatedly

    Synonym: obsession