a bad penny always turns up

(proverb)someone or something unwelcome will always reappear or return

(諺)討厭的人（或物）總是會出現（或回來）

be two (或 ten) a penny

(chiefly Brit.)be plentiful or easily obtained and consequently of little value

(主英)太多（或太容易得到）而不值錢

count (或 watch 或 美

(或your penniesbe careful about how much one spends)(或your)be careful about how much one spends

關心花了多少錢

in for a penny, in for a pound

used to express someone's intention to complete an enterprise once it has been undertaken, however much time, effort, or money this entails

一旦開始就做到底；一不做，二不休

look after the pennies and the pounds will look af

(proverb)if you concentrate on saving small amounts of money, you'll soon amass a large amount

(諺)積少成多；注意存小錢很快就可以積累一大筆錢

pennies from heaven

unexpected benefits, especially financial ones

意外的好處，意外之財

the penny dropped

(informal, chiefly Brit.)used to indicate that someone has finally realized or understood something

(非正式，主英)最后明白了，終于明白了

a penny for your thoughts

used in spoken English to ask someone what they are thinking about

［用于英語口語］你呆呆地在想什么啦！

pretty penny

A considerable sum of money

一大筆錢

I paid a pretty penny for that ring.

我花了一大筆錢買了那個戒指