when is world environment

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when is world environment
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when is world environment
when is world environment

when is world environment
世界环境日是哪天?
world environment day
世界环境日
[例句]Un secretary general kofi annam speaks on world environment day.
联合国秘书长科菲安南世界环境日致辞.
世界环境日为每年的6月5日.