By the help of microscopes, there is nothing so small as to escape our inquiry; hence there is a new visible world discovered to the understanding.

The world, as a rule, does not live on beaches and in country clubs.

"The world is a book, and those who do not travel read only one page."

煤炭的未来在于平衡环境责任与能源需求。

水从高处流下来，势头非常急促