你的朋友怎么可以生气成那个样子。

How your best friend can just blow up like that.

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当然，二氧化碳与温度的相关性并不能确定是大气成分的变化导致了气候变暖或变冷的趋势，还是它们本身造成的。

The correlation of carbon dioxide with temperature, of course, does not establish whether changes in atmospheric composition caused the warming and cooling trends or were caused by them.

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采用甲硫醇、呋喃硫醇、吡嗪、反-2，4-壬二烯醛和呋喃酮等主要的牛肉香气成分香原料，可以调配出香气逼真的炖牛肉香精。

Methanethiol, furanthiol, pyrazine, trans, trans-2,4-nonadienal and furfuran ketone were used to develop beef flavor.

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