It's big and blue.Birds fly in it.What is it.

It's big and blue.Birds fly in it.What is it.
It's big and blue.Birds fly in it.What is it.

It's big and blue.Birds fly in it.What is it.
它是大而蓝的.小鸟在其中飞翔.这是什么?是sky(天)

sky
sky
原文意思是它很大而且是蓝色的，鸟在里面飞，它是什么？
答案是天空，sky