It’s a right. John is looking at the sky.
这是一个晚上。约翰抬头看着天空。

Tom is John’s younger brother. He asks John “What are you doing?”
汤姆是约翰的弟弟。他问约翰:“你在干什么?”

John says, “I’m counting stars.”
约翰说:“我在数星星。”

Tom laughs and says, “It’s really dark now. Why not count them tomorrow morning?”
汤姆笑着说:“现在天空太黑了。你为什么不等到明天早上再数呢?