滚滚浓烟盘旋翻腾，恶臭味呛得她喘不过气来。Dense smoke swirled and billowed, its rank fumes choking her.但这似乎是一潭死水：受了污染而且恶臭无比。But this water seems dead: it's polluted and horribly stagnant.城市被一团恶臭的烟云笼罩着。The city is covered by a foul-smell...
A bright shooting star, or meteor, is an unforgettable sight.明亮的流星，或者说陨石，是番难忘的景象。Like a flash of lightning, the meteor shot across the sky.流星像一道闪光划过天空.It was made by a meteor that fell from space.它是由流星从太空中坠落造成的....
成长期的成人有体质酸化的现象.As adults mature their blood becomes more acidic in nature.随着污染的加剧,土壤的酸化越来越严重.The soil becomes more and more acidic as pollution mounts up.由于酸化反应,菌落的周围会变成黄色.Due to acidification the agar surrounding the co...