Lucy:"They serve the purpose of changing hydrogen into breathable oxygen, and they’re as necessary here as the air is, on Earth.

Ray:"But I still say……they're flowers."

Lucy:"If you like."

Ray:"Do you sell them?"

Lucy:"I'm afraid not."

Ray:"But, maybe we could make a deal."

……

Lucy:"What do you mean?"

Ray:"Oh, you see, you won’t have to send them anywhere. I’ll pay for them, and then, I’ll leave them here, for you."