2024 年初，在美国某处的一座仓库里，工人们正在做一件看起来有些奇怪的事：把书一本本送进机器，切掉书脊，扫描，然后把剩下的纸送去回收。
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"The first time there's any type of struggle, the immediate thought is, 'well, I thought you were my soulmate. But maybe you're not, because soulmates aren't supposed to deal with things'," he says. "But if relationships are going to go long term, it's never just going to be a downhill run."，更多细节参见爱思助手下载最新版本
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The weight of each term is given by the proportion of each sub-triangle area with respect to the total triangle area . Algebraically, this can be expressed like so: