在乡村住惯的人,一进城市就觉得车水马龙,熙熙攘攘,噪声四起,目不暇顾。高大的楼房和钢筋混凝土建筑,夹持着狭窄的柏油路,机器的轰鸣声从四面八方向耳朵里灌,就是汽车和拖拉机从身边驶过的嗡嗡声,也比旷野响得多。到了夏季,这里的空气是闷热的,尽管也有凉棚和扇子,但那挥扇而来的风,也是缺少凉意的。真是令人又烦又闷。于是科学家说:“城市被污染了!” People who live in the country, as soon as they enter the city feel busy, bustling, noisy, overjoyed. Tall buildings and reinforced concrete buildings, with narrow asphalt paved, the roar of machinery filled the ears in all directions, the buzz of cars and tractors passing by, and much louder than the wilderness. In summer, the air here is hot, although there are pergola and fan, but the wave of the wind is also the lack of coolness. Really annoying and boring. So scientists say: “The city is polluted!”