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Life on Earth will become unsustainable unless population growth is held in check.
地球上的生命将无法延续，除非人口增长得到控制。
《柯林斯英汉双解大词典》
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He decided to send an angel down to Earth to check it out.
他决定派一位天使下去地球去调查清楚。
youdao
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He decided to send an angel down to Earth to check it out.
他决定派一位天使下去地球去调查清楚。
youdao