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It explodes at concentrations in the air of as little as 5 percent.
当空气中甲烷浓度超过百分之五的时候就会爆炸。
youdao
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When a large star has burnt all its fuel it explodes into a supernova.
一颗很大的恒星烧尽它的燃料后，就爆炸成超新星。
youdao
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When a large star has burnt all its fuel it explodes into a supernova.
一颗很大的恒星烧尽它的燃料后，就爆炸成超新星。
youdao