当时我是有意的笑了笑，希望他是在说笑话。

At the time I laughed knowingly, hoping he was joking.

youdao

我的笑很容易解释——当时我不知道接下来发生的事情——可是劳伦早就知道。

My smile is easy to explain-i didn't know what was coming-but Lauren would have known.

youdao

当时我和这位发明者见了面(说到那位著名专家的指谪，他平静地笑了笑。)，并看到了他工作的结果，知道了事实的真相。

I took my meeting with the inventor (who quietly laughed at the ignorance of this famous researcher), saw the results of his efforts for myself, and knew the truth of the matter.

youdao