唯一不變的是變化，持續(xù)的變化，不可避免的變化，這是當(dāng)今社會(huì)的主導(dǎo)因素。
The only constant is change, continuing change, inevitable change, that is the dominant factor in society today.
Language is not a tool for describing reality, but a reality in itself.
The most valuable resource in our industry isn't underground—it's the people who make it all possible.
To every action there is always opposed an equal reaction； or， the mutual actions of two bodies upon each other are always equal， and directed to contrary parts.