come down to.... 歸根結底
At the heart of it, these deals all come down to mandating emissions cuts, which means paying a lot more for energy.
這個問題的實質並不複雜，所有這些協議其實都可以歸結為一點：強制減排。
詞彙對比：
ultimately 根本上
Ultimately, in any particular case we must rely not only on the rules, but also on reason and our understanding of the situation.
最後，在個別的情況中我們必須不僅要依賴這些規範，還要依靠理性和我們對於情境的理解。
come down to Earth 回到現實中來,腳踏實地
They were so excited by their success that it was hard for them to come down to earth and accept that there was still work to be done.
他們的成就使他們過於興奮，因此，要他們回到現實承認還有許多工作要做，是很困難的。
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