推求

tuī qiú duì fāng dòng jī

推求对方动机

try to find out what the other is after

tuī qiú qí zhōng dào lǐ

推求其中道理

inquire into the reasons within

tuī qiú dì miàn chén jiàng yuán yīn

推求地面沉降原因

inquire into the causes of surface subsidence