You can't teach an old dog new tricks. 人老则守旧。 Let sleeping dogs lie. 別自找麻煩。 Barking dogs seldom bite. 吠叫的狗不咬人。 Curiosity killed the cat. 过份好奇是危险的。 The early bird catches the worm. 早起的鸟儿有虫吃。 When the...