Since then, I only then discovered I liked him.

从那以后，我确发现已经喜欢他了。

youdao

Really only then discovered, own really good tiny!

真的才发现，自己真的好渺小！

youdao

Only then discovered she did not know which should go to board the train.

才发现她不知道该去哪上火车。

youdao

And he actually did this in the late 1800's, back before even all of the elements that we know today were discovered, really only about 60% or so, 70% were discovered then that we now know today.

他最终在十九世纪晚期完成了这一壮举，难能可贵的是,虽然我们现在已经发现了所有的元素，但在当时已知的元素只有我们现在知道,百分之六七十，在这种情况下。

麻省理工公开课 - 化学原理课程节选

Today, enterprising hackers, as the Bush family has discovered, need only the skills, guts, and impetus and can then access an online source from anywhere worldwide.

FORBES: The Not-So-Secret Vatican Archives