Anti-social behaviour has been identified as a major problem by local police. 反社会行为被地方警察局确认为重大问题。这里可以用main 来替代。英语中没有“prime problem”或者“primary problem”的说法。 Helen 单词 prime 的意思是“最的要的，最重要的，最关键的”。比如： ...

About three-quarters of U.S. adults see child care costs as a "major problem," but only about half say helping working families pay for child care should be a "high priority" for the federal ...