这个惨痛的的历史教训，我们全党同志一定要永远记取，引以为戒。

No comrade should never forget the bitter lesson and take a warning from it.

网页顶部的内容该当是最紧张的内容，请记取：好内容必需放置在顶部。

Save the top of your page for your most important content. Remember: good content must flow to the top.