pitfall：a problem or difficulty that is likely to happen in a particular job，cause of action or activity.
pit深坑fall落下 pitfall陷阱，隐患，坑
可替换danger和trap
例句：A used car is indeed a bargain，but there can be many pitfalls associated with the purchase of one.
仿写：Luxurious bags are indeed a symbol of social status，but there can be many pitfalls without considering the real purchasing ability.
翻译：A lawyer’s duty is to use the professional knowledge to help his clients to avoid the legal pitfalls.
造句：A teacher’s duty is to help student s to find their life goals and avoid the pitfalls in study.
