演奏小提琴似乎是简单的事；然而这需要多么长期和艰苦的练习呀！
It may seem a simple affair to play upon a violin; yet what a long and laborious practice it requires!
在4月7日出版的Nature杂志中发表这项经过长期和艰苦的实验所到的结果。
The work, the result of years-long and laborious experimentation, is published April 7 in the journal Nature.
麦凯恩在这场选战中进行了长期和艰苦的努力，他为这个他所爱的国家战斗了更长的时间，作出了更艰苦的努力。
Sen. McCain fought long and hard in this campaign. And he's fought even longer and harder for the country that he loves.
所有人都要求相同的权益和机会，尤其在某些事情上，比如说女性的选举权，经历了长期的艰苦的争取才获得了平等的地位。
We all want the same rights and opportunities, and for some things, such as women's suffrage, it was a long, hard fight to achieve equal footing.
这并不新鲜；嗜酒互戒协会和减肥中心在还没有互联网的时候就已经存在了，他们正是通过艰苦而长期地改变人们的行为来帮助人们的。
It's not new; AA and Weight Watchers were around before the Internet, and they help people through difficult and long-term behavior change.
公元前5世纪，雅典经过海洋和陆地长期艰苦的征战成为爱琴海霸主。
Athens fought long and hard, in conflicts on the sea and on land, to become leader of all Aegean city-states by the early 5th century BC.
考试题库建设是一项长期艰苦的工作，各高校为之付出了大量的人力和物力。
The construction of the test paper storeroom requires the long time and difficult works, a great many of manpower and material resources are consumed.
那些锲而不舍，致力于长期的、艰苦的和全心全意的改变世界的工作的人们一步步推动国家沿着正确的道路前进，使我们长期独树一帜。
It's those folks who stay at it, those who do the long, hard, committed work of change that gradually push this country in the right direction, and make the most lasting difference.
那些锲而不舍，致力于长期的、艰苦的和全心全意的改变世界的工作的人们一步步推动国家沿着正确的道路前进，使我们长期独树一帜。
It's those folks who stay at it, those who do the long, hard, committed work of change that gradually push this country in the right direction, and make the most lasting difference.
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