在現(xiàn)代社會，交通工具巳經(jīng)成為了社會健康持續(xù)發(fā)展的關(guān)鍵因素。但令人遺憾的是，這些交通工具在為我們提供便利的同時，是要我們付出代價的。越是發(fā)展現(xiàn)代交通,我們所要付出的代價也越大。如果人類社會按照這個模式發(fā)展下去的話，將來就會付出更高的成本，受到的打擊也越大。

　　Transportation in all modem societies has become a critical necessity for the continued well being of the community. Unfortunately, the development of these transportation systems has come at a price，in relation to the convenience they provide. The further society goes down that same path, the more expensive, and damaging, it will become.