木石

mù shí jié gòu

木石结构

structure of wood and stone

mù shí xīn cháng

木石心肠

heartless; unfeeling

rén fēi mù shí shú néng wú qíng

人非木石，孰能无情？

A man is neither wood nor stone. How can one be apathetic?

tā zài biàn chéng wū ní de tóng shí biàn chéng le mù shí

他在变成污泥的同时，变成了木石。

He has become marble in becoming mire.