The report carried a serious warning of future trouble.

那报告包含对今后问题的严重警告.

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He received a serious warning.

他受到了严重警告.

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This isappalling, but is serious warning.

这一说法决非是骇人听闻, 而是严肃的告诫.

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The flood in China in 1998 sounded a serious warning to people all over the country.

41998年中国的水灾向中国人民发出了严重警告.

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