词典释义：
双语例句
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The only way to get to 350ppm or below is not only to have major cuts in CO2 emissions but also to draw CO2 out of the atmosphere through measures such as geo-engineering.
想要让二氧化碳含量低于350ppm的唯一途径是，我们不仅要大量减少的二氧化碳排放，还要使用诸如“地质工程”的措施把二氧化碳排出大气层。