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。
Floods across western Africa in September were the worst for several decades.
2007年9月份席卷西非的洪水是几十年来最严重的一次。
This is the most serious natural disaster to affect the region for several decades.
这是几十年来，该地区遭受的最严重的自然灾害。
Computerised tomography (CT) scanning has been used in medicine for several decades.
计算机X线断层照相(简称ct)扫描术在医学领域应用已有几十年时间。
Evidence that plants obtain vitamins from the soil has been available for several decades.
几十年前就存在证明植物能从土壤中吸收维生素的证据了。
Cells based on amorphous silicon, for example, have been in development for several decades.
非晶硅材料制成的电池已经开发了几十年，但它不像普通硅基太阳能电池。
The options have been traded for several decades, starting with the Chicago Board options Exchange.
期权最初从芝加哥期权交易所进行交易，到现在已经交易了几十年。
For several decades, Canada managed to present itself as the friendly giant of environmental issues.
几十年来，加拿大努力成为环境问题中的环保巨头。
That is what he has always done, and he has proved to be exceptionally good at it for several decades.
他一直以来就在冒险，而几十年来他已证明自己对此非常擅长。
The manufacturing sector, in particular, has been outsourcing processes successfully for several decades.
尤其是生产部门，几十年来在外包方面尤其成功。
It appeared for several decades that the promise of change and betterment might come about from the National Congress.
在几十年的时间里，国会的变革和改良的承诺貌似真的就要实现了。
The fact is that for several decades the country did expect workers from Turkey and elsewhere to leave like polite guests.
事实是，几十年来这个国家期望来自土耳其和其他地方的工人象有礼貌的客人那样离开。
For several decades now, researchers have pointed to excessive care as an important factor behind spiraling health care costs.
几十年来，一直有研究人员指出过度诊疗是隐藏在节节攀升的医疗费用背后的一个重要因素。
Before Greece descended into crisis, its lorry drivers required special licences, and none had been granted for several decades.
在希腊坠入危机之前，该国的货车司机需要特殊执照，而几十年来没有授予过一张执照。
Survived for several decades, a number of days a little better, the family may have a bicycle, Mom and Dad can ride a ride to school.
熬过了几十年，日子稍微好过了一些，家里可能有一辆自行车，爸爸妈妈上学时可以骑骑。
The options have been traded for several decades, starting with the Chicago Board Options Exchange. But now there are many options exchanges.
发源于芝加哥期权交易所，期权已经交易了几十年了。
Though this mixture of metals has been the standard for the shiny trophies for several decades, it hasn't always been the composition of choice.
尽管这种混合金属成为这座闪亮奖杯的标准材料已有好几十年了，它却不总是选择的全部。
This old bed was bought by his parents in their poorest days, and served for several decades as a most peaceful "haven" after their days' of toil.
老床铺是他父母在他们最穷困的时候购置的，数十年来，这张床是他们一天劳苦后最安宁的“休息所”。
While India is making a push to expand solar and nuclear energy projects, coal based power plants will be the country's mainstay for several decades.
当印度在推广太阳能和核能工程的同时，燃煤发电厂仍将是未来几十年的最重要能源来源。
But don't expect any information to emerge for several decades-despite the recent declassifications, CIA's Robarge still won't confirm the base exists.
但是，尽管有最近的解密，也不要指望在未来几十年内会有任何新资料会被透露，中情局的罗巴尔仍不愿确认该基地的存在。
But it still says there is nearly 38 trillion cubic metres on the peninsula and in adjacent offshore fields - enough to supply Europe for several decades.
但它仍然称在半岛及邻近的近海油田上有近38万亿立方米储量的天然气——足够供应欧洲几十年了。
We do indeed. Alexander Muir wrote the Maple Leaf Forever as Canada's confederation song in 1867; it was regarded as the national song for several decades.
的确是这样。1867年，亚历山大·缪尔写了一首歌1：永远的枫叶作为联邦歌曲，人们把这首歌当作加拿大国歌长达数十年。
We do indeed. Alexander Muir wrote the Maple Leaf Forever as Canada's confederation song in 1867; it was regarded as the national song for several decades.
的确是这样。1867年，亚历山大·缪尔写了一首歌1：永远的枫叶作为联邦歌曲，人们把这首歌当作加拿大国歌长达数十年。
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