（一）从销售方取得的增值税专用发票上列明的增值税税额；
一个秘鲁贫民窟的居民，在自己的房子里住了几十年，但当他拿着一张手写“地契”去银行贷款时，那张纸在银行眼里毫无价值。没有正式产权，就无法抵押贷款；没有贷款，就没有创业资本；没有资本，就只能在非正规经济中挣扎。这套住房对他来说只是资产，而不是资本，因为它无法进入市场体系，无法产生流动性，也无法参与资本计算。
。爱思助手下载最新版本对此有专业解读
�@�e�Ђ̎��͐��i��25�N�H�̎��_�ŏo�������Ă������ɁA���ĂƔ��ׂĐ��i�T�C�N���������Ȃ��Ă����̂ŁA�����������NCP�{�ɍ��킹���V���i���o���킯�����Ȃ��̂��B���������ACP�{���̂��e�Ђ̐V���i�����I�ډ��Ƃ����킯�ł͂Ȃ����ˁB
One challenge is having enough training data. Another is that the training data needs to be free of contamination. For a model trained up till 1900, there needs to be no information from after 1900 that leaks into the data. Some metadata might have that kind of leakage. While it’s not possible to have zero leakage - there’s a shadow of the future on past data because what we store is a function of what we care about - it’s possible to have a very low level of leakage, sufficient for this to be interesting.