年代

• The seventies proved recycling's practicality and worth .
  七十年代证实了回收利用的可行性和价值。
• During the late seventies world grain reserves were rebuilt .
  七十年代末，世界粮食储备重新建立。
• It is impossible to assign an exact date to this building .
  确定这座建筑物的确切年代是不可能的。
• With it lavoister explained the age-old mystery of burning .
  拉瓦锡以此揭开了年代久远的燃烧秘密。
• Most of these efforts had evaporated by the end of the 1960s .
  这些努力到60年代末大部分看不到了。
• They planned to get on to a break-even basis by mid-1980 .
  他们计划到八十年代中期要做到不亏不盈。
• The climax of negro entertainment was reached in the 1930s .
  黑人剧到了20世纪30年代才发展到顶点。
• Shock upon shock continued to buffet the america of the 1960s .
  震撼一个接一个冲击六十年代的美国。
• By the end of 40's the riddle of superfluidity was solved .
  大约在四十年代末，超流的谜终于解开了。
• I taught in the workers' educational association in the thirties .
  我30年代时在工人教育协会教过书。