[season 01 episode 04]

Sheldon: It occurs to me if I have ever did perfect time machine, I’d just go into the past and give it to myself. That’s eliminating the need for me to invent it in the first place.
Leonard: Interesting.
Sheldon: Yeah, it really kicks the pressure off.
Leonard: Sounds like a breakthrough. Should I call Science Magazine and tell them to hold the cover?
Sheldon: It’s time travel, Leonard, I will have already done that.
Leonard: Then I guess congratulations are in order.
Sheldon: No, congratulations will have been in order.

Sheldon: 我发现，如果我能够制造出完美的时间机器，我就可以回到过去然后把时光机器送给我自己。这样我就不需要从头发明它了。
Leonard: 有意思。
Sheldon: 是啊，这样感觉轻松了不少。
Leonard: 唔听起来像是个重大突破。要不然我给科学美国人打个电话让你上封面？
Sheldon: 这可是时间旅行，Leonard，我应该已经上了封面了。
Leonard: 哦，那我想接下来我就应该恭喜你了。
Sheldon: 不，你已经接下来就恭喜我了。