exercise ['eksəsaiz] ex+erc
physical activity that you do to make your body strong and healthy
to do physical activities to make your body strong and healthy
n. 运动；练习
v锻炼；练习

词组短语
take exercise 做运动；做体操
physical exercise 体育运动；身体操练
regular exercise 常规性的锻炼；经常操练，按时训练
aerobic exercise 有氧运动

ark[ɑ:k]
Often Ark Bible In the Old Testament, the chest containing the Ten Commandments written on stone tablets, carried by the Hebrews during their desert wanderings.Also called Ark of the Covenant
a large ship
the Ark:in the Bible, the large boat built by Noah to save his family and the animals from a flood that covered the earth
A shelter or refuge.
n. 约柜；方舟；（美）平底船；避难所

词组短语
ark of the covenant n. 约柜（藏于古犹太圣殿至圣所内、刻有十诫的两块石板）
Noah's ark 诺亚方舟

arcane[ɑ:'kein]
(formal) secret and mysterious and therefore difficult to understand
adj.限于小圈子内的;神秘的；晦涩难解的；秘传的

哈佛公开课 - 计算机科学课程节选
Not by some very arcane numeric address inside my computer's memory, but by a symbol, by a name.
不是通过一些在我电脑内存中的神秘的数字地址,而是通过一个符号，一个名字。

coerce[kəu'ə:s] co=com
to persuade someone forcefully to do something which they are unwilling to do:
vt.强制；迫使

例句
He was coerced into signing the contract.
他被迫签了合同。

耶鲁公开课 - 公正课程节选
But it would still be wrong to coerce him.
但强迫他仍然是不对的。

绯闻女孩第2季第4集
Yes, you were. I would never try to humiliate you like that.
No.But you would try to coerce a girl not to go out with me in the first place.
你是错了，我绝不会那样让你受辱的。
不。是你先去强迫一个女孩,不和我一块出去的。

coercive [kəu'ə:siv]
using force to persuade people to do things which they are unwilling to do:
adj.强制的；胁迫的；高压的

耶鲁公开课 - 政治哲学导论课程节选
Would such a plan of justice not be overly coercive in forcing people into predefined social roles?
这样的计划正义,难道不是过度强制性地将人逼入事先设定好的社会角色吗？

耶鲁公开课 - 公正课程节选
So taxation by consent of the governed is not coercive.
经统治者同意的税收就不是强制的。

coercion [kəu'ə:ʃən]
n. 强制；强迫；高压政治；威压；压制

耶鲁公开课 - 旧约导论课程节选
He's not affected by magical coercion. And biblical monotheism, biblical religion, assumes that this God is inherently good.
他不受巫术压制的影响，并且圣经的一神论，圣经的宗教，都认为上帝天性善良。