It is striking, however, how much of my subject remains a mystery: how many mathematical stories are still without endings, or read like texts that have yet to be deciphered.

然而，我的课题留下了多少秘密，这是很令人吃惊的：有多少数学故事仍然没有结果，或者读起来就像看密电译文一样。

youdao

The three of them find themselves in the middle of a big mystery that has yet to be solved: the mist that devours people, the source of all evil.

这三个人被牵扯进一场有待解决的迷雾之中：吞噬人类的谜团——所有邪恶的来源。

youdao