限制技术的发展

Throughout history, man has changed his physical environment to improve his way of life.
从古至今，人类为了改善自己的生活方式对自然环境进行了诸多改造。
With the tools of technology, man has altered many physical features of the earth.
在技术的帮助下，人类已经改变了地球的许多物理特征。
He has transformed woodland into farmland.
他把林地变为耕地。
He has modified the face of the earth by cutting through mountains to build roads and railways.
为了建造公路和铁路，他开辟山林，改变地表。
However, these changes in the physical environment have not always had beneficial results.
然而，这些由自然环境变化带来的影响并非总是有利的。
Today, pollution of the air and water is a danger to the health of the planet.
如今，空气和水污染已对地球的健康造成了威胁。
Each day thousands of tons of gases come out of vehicles.
每天，机动车都会排放成千上万吨的尾气。
Smoke from factories pollutes the air of industrialized areas and the surrounding countryside.
工厂排放的烟雾污染着工业区以及周边郊区的空气。
The air in cities is becoming increasingly unhealthy.
城里的空气日益恶化。
The pollution of water is equally harmful.
水污染的危害也同样严重。
In the sea, pollution from oil is killing a lot of sea plants and fish.
海洋里，油污染正在残害大量的海洋植物和鱼类。
It is now necessary for man to limit the growth of technology in order to survive on earth.
为了在地球上生存，人类限制技术发展已是势在必行。