The stone mortar is one of the earliest tools for processing grains.
2
大象好像是一只石臼。
The elephant resembles a stone mortar.
3
本文对石臼港区强风化花岗岩的变形和破坏的力学机制做了全面地分析论证。
This paper has made a comprehensive analysis and demonstration to the mechanism of deformation and destruction of granite strong weathering zone in Shiju Port.