一层烟雾低悬在污浊的空气中。A layer of smoke hung low in the stale air.大城市的空气往往是污浊的.The air of a big city is often impure.他发现那污浊的水开始往下退了.He saw that the dirty water had begun to recede....
B : Yes. By the way do you often surf the Net?是的,顺便问一下,你经常上网 吗 ?I sometimes get up at three or four in the morning and I surf the net.“我有时候早上三或四点起床,在网上冲浪. ”...surf rolling onto white sand beaches.涌上白色沙滩的激浪Holidaymakers c...