英语短语学习：某种生意或职业的诀窍

　　Tricks of the trade
　　某门生意或职业的诀窍
　　英语表达tricks of the trade意思是“某种生意或职业的诀窍”，这些窍门是该行业内的专业人士必须掌握的或者只有他们才知道的专业知识。
　　例句：
　　It takes a while to learn the tricks of the trade, but once you do you can make a good living as a plumber.
　　I learned the tricks of the trade from my father, so I can take over his business when he retires.
　　注意：
　　这个表达也可以用于贬义，来形容商业行为中不诚实的做法。
　　例句：
　　Digitally altering photos is one of the tricks of the magazine business. Their models don’t look like that in real life.
　　The greengrocer always weighs the fruit in a bag. It’s one of the tricks of the trade, it doesn’t make much difference to an individual purchase but over the year it all adds up.