Compel在剑桥英语里的解释是to force someone to do something，即强迫别人做某事，往细了讲，“强迫”来源于人、势力、形式或者规则，
例如：1. The traffic jam compelled him to take the subway. 塞车使他不得不去坐地铁。
2. Nobody can compel me to say sorry to him. 没有人可以强迫我向他道歉。
Compel也可以指自己内心认为应该是对的，所以要去做，例如：I felt compelled to call him and tell him the truth. 我觉得必须打电话给他，告诉他事实。
Force首先可以替代compel，表示人、势力、形式、规则等强迫某人做某事，
例如：She was forced to stay at home because of her headache. 头痛让她不得不待在家里。
Force还有一个意思是通过胁迫等手段逼某人去做某事，
例如：The bad man forced his employers to work for 12 hours every day. 这个坏蛋逼迫他的员工每天工作12个小时。
宇晨yuchen
