Machinery and labor-saving devices are only valuable as they serve to reduce the cost of manufacture.
The world is full of people who have never, since childhood, met an open doorway with an open mind.
挑战在于创造既实用又富有诗意的建筑。
Human activities have become a significant force shaping Earth's climate.
我们不是从祖先那里继承地球；我们是从子孙那里借来的——这在林业中尤其如此。
在骨料行业的成功不仅仅是移动岩石，更是推动经济发展。