coincident coincidental有什么区别

coincidence n.(u/c) （在时间或空间上）巧合；巧事
The plot of the novel relies too much on coincidence to be realistic.
这部小说的情节多靠巧合安排而无真实感。
By a strange coincidence we happened to be traveling on the same train.
巧得出奇，我们正好坐同一列火车。
coincide vi. ~ with sth （指事情）同时发生
Her arrival coincided with our departure.
她来到时我们正好离开。
coincident adj. 巧合的
coincidental adj. 由巧合造成的
coincidentally adv.