"You have to be able to sort," Stern said.

“你需要有分类的能力。”Stern说。

youdao

"Many people think it's special to be a planet," Stern said.

“很多人认为行星很特殊。”Stern说。

youdao

"Many people think it's special to be a planet," Stern said.

“很多人认为行星很特殊。”Stern说。

youdao