1) take a rain check 改期 2) lost count 弄不清晰 3) be in another world 精神恍惚;魂不守舍 4) make yourself at home 随意，随便 5) save your breath 省口气吧;别白费口舌了 6) make sense 故意义，理解 7) cost sb. an arm and a leg 非常昂贵 8) burn a hole in one's pocket 很快地被花光 9) fill one's shoes 很好地顶替;令人满意地替代 10) is ice cold 体现理所当然 11) like apples and oranges 用来体现无法相比旳事物 12) lose one's train of 忘掉 13) meet each other half way 互相妥协，让步 14) on the dot 准时;正点 15) once and for all 最终一次;干脆 16) out of earshot 不在听力所及范围 17) out of this world 非常好 18) play by ear 随机应变，视情形而定 19) ring a bell 令人想起某件事;听起来耳熟1．。。If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet.By the middle of the 21st century,if present trends continue, we will have used up all the oil that drives our cars,for example.Even if scientists develop new ways of feeding the human race,the crowded conditions on earth will make it necessary for lus to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however,has recently been suggested by American scientist, Professor Carl Sagan. Sagan believes that before the earth's resources are compleetely exhausted it will be possible to change the atmophere of Venus and so create a new world almost as large as earth itself. The difficult is that Venus is much hotter than the earth and there is only a tiny amount of water there. Sagan proposes that algae organisms that can live in extremely hot or cold atmo...
