C197 Laboratory Mouse

"What does that mean?"

Mengmeng thought for a moment, but was unable to understand what the meaning was.

Xiaoyu forced himself to stop the tears in his heart, and explained with a smile, "I mean that it is necessary, it is necessary."

Looking at the three thick books, the Xiaoyu sighed.

Diehde still wanted to check, so he could not casually fill it out.

Sigh