Compared to the living standard of the past period and nowadays, it is no denying that people’s nice living environment and high quality of living level owing to the rapid development of science and technology. The advantages are too obvious and valuable to be neglected. In the past time people have to spend days on the way if they want to visit friends who lived far away, now taking cars, trains or airplanes can greatly shorten the tour time. And the great invention i.e. the computer, makes people communicate more conveniently. However, there exist some disadvantages as well. For instance, the worst problem that is blamed for the quick development of science and technology is environmental pollution. A large number of cars and factory emerged in recent years, which is giving off lots of harmful gas and waste. In addition, the forest is reduced and many kinds of animals disappeared. It is time for us to take care of the earth.

　　與過去和現(xiàn)在的生活水平相比，不可否認(rèn)的是，人們良好的生活環(huán)境和高質(zhì)量的生活水平要?dú)w功于科學(xué)技術(shù)的快速發(fā)展。這些優(yōu)勢太明顯和有價(jià)值，不容忽視。過去，如果人們想拜訪住在很遠(yuǎn)的朋友，就不得不在路上呆幾天，現(xiàn)在坐汽車、火車或飛機(jī)可以大大縮短旅游時(shí)間。偉大的發(fā)明，即計(jì)算機(jī)，讓人們更方便地溝通。然而，也存在一些缺點(diǎn)。例如，科學(xué)技術(shù)快速發(fā)展的最大問題是環(huán)境污染問題。近年來出現(xiàn)了大量的汽車和工廠，排放了大量有害氣體和廢物。此外，森林正在減少，許多種類的動(dòng)物消失了。真的是我們照顧地球的時(shí)候了。

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