One story says it got that meaning from the custom of throwing boiling water down on enemies attacking a castle.

VOA: special.2009.05.10

So this is a myth in the sense that it's explaining some custom or ritual among the people.

这有点神话色彩,它解释了人类中间的一些习俗和仪式。

耶鲁公开课 - 旧约导论课程节选

Well, it's definitely, you know, that's the custom here is,

这是这里的一种习俗，

一定要给小费 - SpeakingMax英语口语达人

Both had participated in what David Donald used to call the great American practice or custom, tradition actually he called it, of compromise.

他们都参与了,大卫·唐纳德曾经称为,那场伟大的美国实践或美国习俗,实际上他称之为传统,和解的传统

耶鲁公开课 - 美国内战与重建课程节选

Even if we locate a source of some kind of genuine strength, authoritative strength, it's still usually possible, as it is for Satan, to argue that that power is really at base just the concealed product of custom or what we would think of as cultural construction.

有时即使我们找到了一种真实的，权威的力量，还是有可能像撒旦所辩解的那样，这种力量其实只是,约定俗成的规矩教条的隐秘产物,或者如我们所想来自文化建构。

耶鲁公开课 - 弥尔顿课程节选