The sky over the city was overspread with a heavy smog.城市上空罩上了一层烟雾.Cars cause pollution, both smog and acid rain.汽车造成的污染既有烟雾也有酸雨。The river appeared as if enveloped in smog.那条河好像笼罩在烟雾之中。attempts to reduce smog caused by t...
He must be a very strange - looking camel driver for people to gape like that.他必定是个很奇怪的拉骆驼的,他想;要不然,大家为什么这样呆呆的看着他呢?His secretary stopped taking notes to gape at me...他的秘书停止了记录，目瞪口呆地望着我。He that gapes till he be fed will ga...
...tritium, a radioactive isotope of hydrogen.氢的放射性同位素氚Tritium has a half - life of 12.4 years.氚的半衰期为12.4年,地球形成时的氚早已不存在.The Energy Secretary hopes to bring on line a safer new tritium production reactor...能源大臣希望能投产一座更安全的...