GIRL:Wow.You seriously spend a lot of time alone.

BOY:What?So here’s how it works.Water goes in the top,and food comes out the bottom.

GIRL:When you shot it into the stratosphere（ ['strætə,sfɪə]同温层） you figure it would induce（ [ɪn'djuːs]引起） a phase（[feɪz]相位） change from the cumulonimbus（ [,kjuːmjʊləʊ'nɪmbəs]积雨云） layer?

BOY:That’s actually a really smart observation.

GIRL:I mean...The clouds probably have water in them...which ,I guess ,is why you shot it up there in the first place.

BOY:Hey.That’s why I did thatOn porpose.

GIRL:Right.