Fluoride damage is generally restricted to areas near manufacturing plants.氟化物的危害一般局限在制造厂的附近.It'shows a thousandfold selectivity for fluoride over other common anions.它对氟离子的选择性比其它普通阴离子高几千倍.Fluoride injury often is c...
He folded the papers and stuck them in his desk drawer.他将文件叠起来，塞进自己的书桌抽屉里。He gave the girl at the desk the message.他把便条递给了桌旁的女孩。On his desk is a mass of books and papers.他的书桌上有大堆的书籍和文件。...
a man with heavy jowls下巴底下一堆肉的男人Whiskers grew luxuriantly from his ample jowls.他长着浓密的络腮胡子.He had a long lugubrious face with drooping jowls and soft pouches beneath the eyes.他有着阴沉的长脸,下垂的下颚,眼睛下面的眼袋松泡泡的....
Cow pats would litter pastures, making grass inedible to cattle and depriving the soil of sunlight.牛粪在草场上随处可见, 使得牛群吃不到草,也使土壤得不到阳光的照射.Sod seeding is now a practicable proposition on permanent pastures of the better soils....