半世纪的

The number of chinstraps decreased by 30 to 66 percent in some colonies, as less food made it more difficult for the young to survive, while the emperor penguin has seen some of its colonies halve in size over the past half a century.

部份绅士企鹅族群数量减少百分之卅至六十六不等，短缺的食物也让年幼企鹅更难生存。过去半个世纪来，部份帝王企鹅之族群数量也已减半。

The north Caucasus, on the other hand, was colonised by Russia only in the second half of the 19th century, and was never fully assimilated.

与之形成对照的是，北高加索在19世纪后半叶才被俄罗斯吞入口中，而且从来没有被完全消化。

Over the past half-century, people have found by comparing that plant dyestuffs are good to people's health and superior to chemical dyestuffs.

半个多世纪以来，人们通过比较，认为植物染料对人体有益无害，这是化学染料无法相比的。特别是发达国家更重视植物染料。

Though both data mining and statistical diagnostics have only fifty-year history, a lot of achievements have been made. However, there are many problems remaining unsolved.

由于数据挖掘和统计诊断是近半个世纪才发展起来的新兴学科，虽然取得了很多研究成果，但仍有许多问题处于探索之中。

It was the first time in almost a half-century that there were candidates from more than one party .

这是将近半个世纪以来，第一次从多政党的候选人中进行选举。

For all but 11 months of the past half-century, Japan has been ruled by the LDP.

过去的半个世纪，自民党只有11

Within the past half-century, symbols and characteristics that are truly unique to Canada have been developed.

在过去半个世纪里﹐加拿大已经形成自身独特的形象和特征。

In the half-century since, that alliance has endured as a foundation for our security and prosperity.

在此后半个世纪中，这一同盟作为两国安全与繁荣的基础持续至今。

Its practice of the past half-century reference to the experience and lessons of the vast number of developing countries should draw.

其实践半个世纪以来的经验与教训值得广大发展中国家参考、借鉴。

At the same time, the government announced it would be closing thousands of workplace lunchrooms, in exchange for paying employees a daily stipend, and that the food ration, in existence for nearly 50 years, supplying rice, beans, sugar, salt and other basics at subsidised prices, must eventually go.

同时，古巴政府宣布，将关闭成千上万个职工食堂，改为按日向员工发放补贴，并宣布，存在近半个世纪之久的食品配给制最终必须取消，该制度以补贴价格供应大米、豆、糖、盐以及其它基本物品。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！