The idea was to compare teenage with adult rats after theyd had a dose of alcohol让青春期和成年老鼠都喝了酒后对比

compare with与 ... 相比

Compare with apartment hunting, my research work is a cinch.

跟找房子相比，我的研究工作真算不上什么。

Teacher takes Shelley to compare with Keats mutually.

教师拿Shelley与Keats相比较。

and see which one was better at keeping their balance.看看哪个的平衡感更好

keep balance保持平衡

He tried to keep balance between income and expenditure.

他试图保持收之平衡。

So the rats were put upside down on a slope -老鼠被面朝下放到一个斜坡上

upside down颠倒

The painting is upside down.

图画颠倒了。