To be an inventor, one needs profound knowledge as well as a very vivid imagination.

要成为一名发明家，就需要渊博的知识和丰富的想象力。

He had extensive and profound knowledge.

他的学问博大精深。

Profound knowledge in laboratory medicine.

扎实的医学检验科知识。

My mind, profound knowledge of the teacher.

我的胸怀博大，知识精深的老师。

Profound knowledge is accumulated little by little.

渊博的知识是一点点积累起来的。