1 sentence

1. 股票价格只有两次有用——当你买的时候和当你卖出的时候。

   gǔ​piào​jià​gé zhǐ​yǒu liǎng cì yǒu yòng— dāng nǐ mǎi de shí​hou hé dāng nǐ mài chū de shí​hou.

   Stock prices are useful only twice — when you buy, and when you sell.

   Source: CCMatrix