How it works: Place a closed book on the floor in front of you - something you've read before.

怎么做：放一本合上的书在面前的地板上——书是你之前看过的。

youdao

How it works: Place a closed book on the floor in front of you - something you've read before.

怎么做：放一本合上的书在面前的地板上——书是你之前看过的。

youdao