如果字段有单个值，则简单的访问程序将把(关键字，值)对添加到文档中。
If a field has a single value, a simple accessor adds the (key, value) pair to the document.
凡是恋爱过的人都知道这个简单的“她”字所包含的种种光明灿烂的意义。
Whoever has loved knows all the radiant meanings contained in those three letters of that word: She.
TCP/IP 套接字是连接两个应用程序的最简单的方式之一。
TCP/IP sockets are one of the simplest methods to connect two applications.
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