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Several decades have elapsed since I graduated from the college. 我大学毕业已数十年了。
Their productive cycle covers several decades. 它们的生产周期可延续几十年。
Life however several decades, fillip a flick. 人生不过几十年，弹指一挥间。
For several decades Panama was effectively an American colony. 几十年来，巴拿马实际上是一块美国的殖民地。
I trained dogs privately for several decades as well. 受过训练的警犬私下了几十年一样。
For several decades, juvenile delinquency is not a juvenile. 几十年了，少年早已不是少年了。
Noscapine has been primarily used as antitussive agent for several decades. 过去几十年中,那可丁一直被用作镇咳药。
They are only a handful, we'll leave them to their own devices and shelve them for several decades. 他们人数很少，摆到那里，摆他几十年，听他怎么办。
All of those changes occurred over several decades,whereas the current technology is changing every few years now. 但是以往的变化历时几十年，而当今的技术每几年就会发生变化。
Like the whole Ruhr area, Duisburg also underwent a change of economical structure in the last several decades. 如同整个鲁尔区一样,杜伊斯堡市在过去的几十年里也经历着一场经济结构的变迁。
It usually takes several decades for atherosclerosis to reach an advanced stage. 动脉粥样硬化一般要经几十年才发展到晚期。
After several decades of wrangling since the last years of the Ching Dynasty, it has still not been cleared up. 这个国体问题，从前清末年起，闹了几十年还没有闹清楚。
Over the past several decades, though, experimental psychologists have learned which methods reliably lead people to concede, comply, or change. 然而，通过过去几十年的研究，试验心理学家掌握了能够使他人让步、服从和改变的可靠方法。
If successfully commercialised, the pebble bed reactor would be the first radically new reactor design for several decades. 该球床反应堆如果成功实现商业化，将是数十年来首个全新的反应堆设计。
The Empress Dowager of the Qing Dynasty attended to state affairs for several decades. 清朝慈禧太后垂帘听政几十年。
After several decades of wrangling since the last years of the Ching Dynasty,it has still not been cleared up. 这个国体问题，从前清末年起，闹了几十年还没有闹清楚。
In Washing-ton,D.C.,for example,the waiting list for season football tickets is several decades long. 比如在华盛顿，买美式足球赛季的票得等上几十年。
The redacted report charges that the PRC had "penetrated" those US weapons labs several decades ago. 报告称，中国政府早在数十年间前就在向这些美国国家实验室中渗透。
I am certain that it will remain so and that,having been tested for several decades,it will be able to do its duty. 我确信，我们的军队能够做到这一点，几十年的考验证明军队能够履行自己的责任。
Several decades ago,in my father's time,almost all the pearls were a two years crop,sometimes even 3 years. 几十年前在我父亲的年代里，几乎所有的珍珠都要养2年甚至3年。