對於歐洲外交關係委員會（ECFR）資深政策研究員艾莉·格拉邁耶（Ellie Geranmayeh）而言，美國總統特朗普在行動時機與定調上的安排，幾乎毫不掩飾其政治目標。
it versus spending that same 10% on a paper 100x more important
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Why didn’t Sinh[ ArcCosh[x] ] just return √(x² − 1)? The expression it returned is equivalent to this: just square the (x + 1) term, bring it inside the radical, and simplify. That line of reasoning is correct for some values of x but not for others. For example, Sinh[ArcCosh[2]] returns −√3 but √(3² − 1) = √3. The expression Mathematica returns for Sinh[ArcCosh[x]] correctly evaluates to −√3.
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