Sheldon: You know, I've been thinking about timetravel again. Leonard: Why? 0️⃣ Did you hit a roadblock with invisibility? Sheldon: 0️⃣ Put it on a backburner. Anyway. It occurs to me, 1️⃣ if _________ a perfect time machine, 1️⃣ _________ into the past and give it to myself. That's 2️⃣ 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 3️⃣ a breakthrough. Should I call Science Magazine and tell them to hold the cover? Sheldon: It's time travel, I will have already done that. Leonard: Then I guess congratulations are in order. Sheldon: No, congratulations 4️⃣ _________ in order. @i_like_eng #video Write in the comments what the phrases by number 0️⃣ mean👇