This is because various local engineering geology conditions make different earth distribution and earthphysics mechanical properties.
这是由于各地区的工程地质生成条件不同，土分布、土的物理力学性质不同；
2
The book is a friendly, down-to-earth introduction to physics.
这是一本简明、实用的物理学入门书。
《柯林斯英汉双解大词典》
3
Then imagine the difficulties of defending it against the obvious criticisms in an era before mathematically rigorous physics: why are we not flung from the Earth if it spins round so fast?