When not removed, plaque causes tooth decay and gum disease.牙斑如果不清除就会导致牙齿蛀蚀和牙龈疾病。There are problems of urban decay and gang violence.存在城市衰败和帮派暴力的问题。The phosphate was deposited by the decay of marine microorganisms.海洋微生物腐...
Some utensils were in a state of decay when they were unearthed.有些器皿在出土时已经残破.The house is in decay.这栋房子已经坏了。There are problems of urban decay and gang violence.存在城市衰败和帮派暴力的问题。Our powers decay in old age.我们的体力在老年时就衰退。...d...
The biology class studied the generation of fruit flies.生物班的学生研究了果蝇的繁殖。A lie begets a lie till they come to generation.谎言生谎言,谎言传万代。The generation of aerosols in polluted atmospheres has been investigated in several exper...
氡和钍射气的子体易被气溶胶吸附.The daughter nuclides of radon and thoron tend to become attached.锕射气氡的一种放射性的, 惰性的和气态的同位素, 其半衰期为3.A radioactive, inert, gaseous isotope of radon, with a half - life of 3.92 seconds....
改正缺点to rectify a fault跟辅道员谈几次就会使他改正过来的.A few sessions talking to a counsellor should straighten him out.经过反复教育,他们仍拒不改正错误.After repeated education they still refused to correct their errors....