The city's poor are like the roots of a tree: unseen, but essential to its survival.
海洋是伟大的高速公路,伟大的平原,人类交往的伟大领域。
The act of writing is an act of resistance against the absurdity of life.
科学的进步不仅是通过回答问题,而是通过提出更好的问题。