Thai authorities have received 61 foreign nationals believed to be victims of human trafficking and scam operations in ...

大部分城里人从小就被教导“饭前便后要洗手”，“生水要烧开了才能喝”，但是你知道这是为什么吗？有人可能觉得只是卫生习惯，有人会说“应该为了避免食物中毒，防止感染”，了解初级微生物常识的人可能会进一步指出“这样就不会手上的微生物（比如粪便中的病菌、寄生虫 ...

See? “By” originally means “bye” or byway. That’s why, in fact, some people still spell “by the by” as “by the bye”. By the way, “that is by the by or bye” in this sense (secondary) is an idiom that ...