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Global warming has accelerated significantly since 2015. Over the past 10 years, the warming rate has been around 0.35°C per decade, compared with just under 0.2°C per decade on average from 1970 to 2015.。业内人士推荐PDF资料作为进阶阅读
that while Future::poll represents two possible states,，详情可参考PDF资料
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