Of course, it's not just smells that can be good memory cues -- pictures can as well.

当然，不仅仅是气味可以成为很好的记忆线索——图片也可以。

" This is a mistake? " I heard the sadness in my voice, but I didn't know if he could as well.

“这是个错误？”我听出了自己声音里的悲哀，但我不知道他是否也能听出来。

I just kind of interpreted things as best I could, and my memory of that is that that was not particularly difficult or traumatic.

我只是尽我所能解释一下，我的记忆是，那并不是特别艰难或痛苦难忘。

And that applies for " should" and " could" as well, so it would be: " I wouldn't have to" , " I couldn't have to" .

这也适用于“应该” 和“可以”，所以它会是：“我不必” ，“我不必” 。

This is what I want you to remember and what I want you to know: that if cynical stories can become self-fulfilling, our work shows that hopeful ones can as well.

这就是我想让你记住的，也是我想让你知道的：如果愤世嫉俗的故事可以自我实现，我们的工作表明充满希望的故事也可以。