coca20000

Problem ˈprɒbləm ˈprɑ:Bləm N.["问题","疑难问题","习题","引起麻烦的人 Adj.["成问题的","难处理的","关于社会问题的

The word "problem" is a noun referring to an issue, a difficult question, or an exercise.

单词“problem”是名词，指问题、疑难问题或习题。

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