When we read newspapers, we often come across the word pollution.This word was not familiar to the people some decades ago.But now, it is a serious threat to us because.it means the poisoning of the air, seas, rivers and lands, which would do harm to our health.
我們看報(bào)的時(shí)候,經(jīng)常會(huì)看到“污染”這個(gè)詞。這個(gè)詞對于幾十年前的人來說并不熟悉。然而對于我們來說,它是一個(gè)嚴(yán)重的威脅,因?yàn)樗馕吨:諝?、海洋、河流和土地,進(jìn)而對我們造成傷害。