The steel industry is a reflection of a nation's economic strength.
是我们遇到的那些人，让生命变得值得活下去。
The poet must be a master of both thought and expression.
The detective story is the normal recreation of noble minds.
释义：他强调空气密度对于物质形态的决定性作用，认为物质的形态和性质都受到空气密度的影响。