So the book can only be talking about a superficial familiarity, not a deep understanding.

所以这本书只能说肤浅的知识。

youdao

The pulse is differentiated in terms of depth (superficial or deep), speed ( rapid or slow), strength (forceful or weak), shape ( thick or thready, soft or hard) and rhythm.

脉应区分其的沉浮、快慢、强弱、形状和节律。

youdao

Our work should not be superficial but deep.

我们的工作不应该留在表面而应该是深入的。

youdao

Her superficial treatment of deep and dangerous conflicts indicates her lack of interest in the strategically vital region.

CENTERFORSECURITYPOLICY: Condi's African holiday

Evil is a superficial manifestation of a deep disturbance and imbalance in our collective psyche.

CNN: Deepak Chopra: Spiritual healing during times of crisis

As he well knew, the superficial similarities between Britain and America hid differences that lay deep and needed careful unravelling.

ECONOMIST: Alistair Cooke