superstition
n[C, U]
1 (idea, practice, etc based on the) belief that certain events cannot be explained by human reason or physical laws; irrational fear of what is unknown or mysterious 迷信; 迷信的思想、 行为等; (对未知的或神秘的事物的)盲目恐惧
Ignorance and superstition prevent them from benefiting from modern medicine. 由於无知和迷信, 他们无法得到现代医学的好处.
2 idea or belief held by many people for no good or logical reason 很多人持有的并无充分根据的说法
It´s just
(a) superstition that you shouldn´t walk under ladders. 不应该在梯子下面穿过, 人们都是这麽说说罢了.