Kindle 的 personal documents 服务本来就是只供个人使用的。 Amazon 官网上与之相关的条款： Your Use of the Kindle Personal Documents Service[1] You may send personal documents to your supported devices for your personal, non-commercial use only. We may limit the volume or number of documents you may send, download, or store. If you use Kindle Personal Documents to send documents to Kindles that are not registered to your account, our Distributor Terms of Use may apply to you. Please see the Kindle Personal Documents Dist...