In for a penny,in for a pound.做事一開頭,就要做到底；一不做,二不休
例句：
1.In for a penny,in for a pound.
既然得到了一便士,就要爭(zhēng)取得到一英鎊.
2.In for a penny,in for a pound!
賭一便士是賭,賭一英鎊也是賭.
3.In for a penny,in for a pound.
既已投下一便士,爽再一英鎊；一不做,二不休.
4 You shouldn't stop halfway.In for a penny,in for a pound.
你不能半途而廢.一不做,二不休.
5.For example,if you took a copper penny and cut it in half.
例如,如果你把一分面額的銅幣切割成兩半.
7.When we once get into the work,in for a penny,in for a pound.
我們一旦進(jìn)入這項(xiàng)工作,就要一不做二不休,把它干到底.