The core of Pinduoduo is "group buying," allowing users to participate in shopping through social means.
拼多多的核心是“拼”，通过社交的方式让用户参与到购物中来。
书籍是反映我们恐惧的镜子。
It is impossible to live without failing at something, unless you live so cautiously that you might as well not have lived at all.
科学是无穷尽的。