be used again 可再利用的
sludge n. thick mud; the product of sewage treatment 淤泥,污泥
smokestack n. chimney used by factories to discharge smoke into the upper air 大烟囱
stack n. a pile of sth., like lumber 堆
堆,垃圾堆
stumble vi. trip and almost fall 绊一脚,绊跌
thereby ad. by that means; in that connection 由此,从而
unsightly a. displeasing to the eye 不顺眼的;难看的
vicious a. dangerous; cruel 险恶的
wear out reduce to a useless state by use 磨损,用坏
compressor n. 压缩机
diaper n. 尿布
toaster n. 烤面包器;烤面包电炉
toothpaste tube 牙膏管;牙膏皮
wrapper n. 包装物
UNIT 39 MORE PEOPLE AND MORE PRODUCTS
GLOSSARY
advantage n. definite benefit; sth. that may help one to be successful or to gain a desired result 优点,优势,好处
approximately ad. nearly; almost 近似;大约
assemble v. fit or put together (sth. such as a machine) 装配
campaign n. series of planned activities to gain a special object 运动
concentrate v. bring or come together 集中
considerably ad. much; a great deal 很多地
constant a. happening all the time; continuous or without break 不断的,经久的
drought n. a long period of dry weather, when there is not enough water 干旱
enrich v. make finer in quality 使丰富,装饰,增美
epidemic n. disease spreading rapidly among many people in the same place for a time 流行病
famine n. serious lack of food 饥荒
feasible a. workable; possible; able to be carried out or done 行得通的,可实行的
figure n. symbol for a number 数字
furthermore ad. moreover; in addition 而且,此外
hygiene n. science of healthy living and cleanliness 卫生学
hygienic a. of hygiene; likely to promote health; free from disease germs 卫生学的,促进健康的
migrate v. move from one place to another; change one‘s place of living 迁移,移居
migration n. the act of migrating 迁移,移居
mountainous a. full of or containing mountains 多山的
occupy v. line in; take possession of 占领,占据
populace n. common people 平民,大众
populate vt. live or settle in an area 居住于…中
prehistoric a. of a time before recorded history 史前的
preservation n. preparation of food to resist decay (食品)保藏
profitable a. resulting in money gain 有利有图的
replace v. take the place of 代替,取代
security n. the state of being safe 安全
significantly ad. importantly 重大地
spec