credible, credulous, plausible 辨析

credible, credulous, plausible 辨析
credible, credulous, plausible这一组形容词都有\”可信的\”意思。
credible a.可信的，可靠的。
That the student told the teacher a credible story that she missed classes because she was sick.那个学生跟老师讲了实情，她没来上课是因为她病了。
credulous a.轻信的，易于相信的。
She was credulous when she listened to the salesman and bought the car for too much money.她很容易轻信别人，竟然听信那个销售员的话以高价买了那辆车。
plausible a.似乎有理的(可信的)。常带有怀疑的意思。
Even though it is a plausible explanation, I am not completely convinced.虽然这个解释合理，但仍不可能使我完全相信。