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pitfall ['pɪtfɔ:l] n
econ.	圈套
pitfalls n
securit.	问题; 易犯的错误
pitfall ['pɪtfɔ:l] adj.
dril.	毛病
manag.	易犯的错误; 隐患; 失误
space	缺陷
sport.	陷阱

pitfall: 4 phrases in 4 subjects

Artificial intelligence	1
Economy	1
Geophysics	1
Oil / petroleum	1