A new broom sweeps clean.
新官上任三把火。
An eye for an eye and a tooth for a tooth.
以眼还眼,以牙还牙。
An hour in the morning is worth two in the evening.
应该是一日之计在于晨!(早上的一个小时,比晚上的2个小时更有价值)
An old dog cannot learn new tricks.
狗嘴吐不出象牙。
An ounce of luck is better than a pound of wisdom.
聪明才智,不如运气。