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in the PONS Dictionary

problem [ˈprɒbləm] N

1. problem:

problem
问题 wèntí
problem
难题 nántí

2. problem:

problem
(数学或物理)习题 xítí

year 2000 problem N

year 2000 problem
(计算机的)千年虫问题 qiānniánchóng wèntí