At best they were effective as antidepressants for no more than four months.它们充其量也只能起到4个月的抗抑郁剂的效果。Modern pharmacology offers an abundance of tranquilizers, antidepressants and anti - anxiety drugs.现代药理学提供了许许多多的镇静剂 、 抗抑郁剂...
银行家与钟表匠已经在伦敦城共同存在好几百年了。Bankers and clockmakers have coexisted in the City for hundreds of years.他目不转睛地盯着钟表。He kept his eyes glued to the clock.他也修钟表。He also repairs clocks and watches....
The gas , which is sulphur - free , contains 89 - 99 % methane, up to 6 % ethane, and 3 % propane.天然气不含硫, 含甲烷88-99%, 乙烷6%和丙烷3%.The method and the condition of separation epoxy ethane from dihydric alcohol are described.介...