2 sentences

1. 它们是两码事。

   tā​men shì liǎng​mǎ​shì.

   They're two different things.

   Source: OpenSubtitles

2. 喜欢一个人和跟他结婚完全是两码事。

   xǐ​huan yī gè rén hé gēn tā jié​hūn wán​quán shì liǎng​mǎ​shì.

   Liking someone and marrying them are two completely different things.

   Source: Dong Chinese Dictionary