PHRASAL VERB 赶走;抛弃;丢弃 To cast out something or someone means to get rid of them because you do not like or need them, or do not want to take responsibility for them. 赶走;抛弃;丢弃 [Also VERB n PREPOSITION]
One of the roles which science plays is that of casting out superstition. [VERBPREP. noun (not pronoun)]
科学发挥的一个作用就是破除迷信。
To be cast out from civilization was the worst fate that could possibly befall me. [VERBPREP. noun (not pronoun)]