Meaning of chá chū:
chá chū
查出
Verb
to find out; to discover
Yīshēng yǐjīng chá chū jíbìng de gēnyuán.
医生已经查出疾病的根源。
The doctor has already found out the cause of the illness.
Yīshēng zhōngyú chá chū le wèntí de gēnyuán.
医生终于查出了问题的根源。
The doctor finally discovered the root of the problem.