在十九世纪以前，对海洋感兴趣的科学家寥寥无几。
Before the nineteen century, scientists with an interest in the sea were few and far between.
许多世纪以前，在西非，传统的说书人一边讲故事，一边演奏乐器。
Many centuries ago, in West Africa, traditional storytellers played musical instruments while they were telling stories.
这些大坝建于近一个世纪以前，是为洛杉矶港的木材和造纸厂提供电力的，大坝阻断了6种鲑鱼的上游产卵地。
Built nearly a century ago to provide power to lumber and paper mills in the town of Port Angeles, these dams blocked access to upstream spawning beds for six species of salmon.
仪器上记录的年代不够久远，因而无法可靠地提供一个世纪以前全球气候变化的测量值。
Instrumental records do not go back far enough to provide us with reliable measurements of global climatic variability on timescales longer than a century.
在19世纪30年代以前，美国的大多数报纸都是通过年度订阅销售的，通常是一年8到10美元。
Before the 1830s, most newspapers were sold through annual subscriptions in America, usually $8 to $10 a year.
在十九世纪以前，对海洋感兴趣的科学家寥寥无几。
Before the nineteenth century, scientists with an interest in the sea were few and far between.
巨石阵建于许多世纪以前。
就像以前的牛仔一样，21世纪的牛仔甚至会在寒冷的早晨早早起床，在火上做早餐。
Like the cowboys of the past, a 21st-century cowboy even gets up early on freezing cold mornings and makes breakfast over a fire.
换言之，现在普通的美国人平均每年比一个世纪以前的美国人多吃50磅以上的肉。
In other words, the average American now eats 50 pounds more meat every year, compared with a century ago.
两个世纪以前，我们的祖先可能会已经知道了他们食用的和拥有的几乎所有有限的东西的历史和来源。
Two centuries ago, our forebears would have known the precise history and source of almost every one of the limited number of things they ate and owned.
一个世纪以前，世界上几乎所有的货币都和黄金关联，其余的大部分和白银关联。
A century ago almost all the world's currencies were linked to gold and most of the rest to silver.
一个半世纪以前，狄更斯在年青的美国大街上走，看到他的小说被盗版贱卖，也相当气愤。
A century and a half ago, Charles Dickens walked the streets of young America and fumed to see his novels in cheap pirate versions.
一世纪以前，一个社区常常可以占有该城市40%的人口，而现在，那些生活业慢慢褪色，变为记忆。
A community which a century ago made up almost 40% of the city's population now lives chiefly in fading memories.
十九世纪早期以前，书籍都是使用笨重的材料，如木头、皮革、金、银和宝石等手工装订而成的。
Before the early nineteenth century, books were hand-bound using heavy materials such as wood, leather, gold, silver and jewels.
在一个世纪以前，毛皮猎人一度将海獭推向灭绝的边缘，当时只有幸存1,000到2,000只海獭。
Fur hunters once pushed sea otters to the brink of extinction and a century ago only 1,000 to 2,000 individuals remained.
在一个世纪以前，毛皮猎人一度将海獭推向灭绝的边缘，当时只有幸存1,000到2,000只海獭。
Fur hunters once pushed sea otters to the brink of extinction and a century ago only 1, 000 to 2, 000 individuals remained.
一个世纪以前，认为青少年是在工作中而不是懒惰或者反叛中成长起来的是极其有益的。
A century ago, it was helpful to start thinking of adolescents as engaged in the work of growing up rather than as merely lazy or rebellious.
许多世纪以前，在印度的一个邻河的村子里，所有的男子都学做木工活儿。
Many centuries ago, in a certain village near a river in India, all the men were trained as Carpenters.
在某种程度上，通用的问题可以追溯到一个世纪以前。
In some ways, GM's problems can be traced to its origins a century ago.
但是值得回忆的是仅仅在一个世纪以前，重于空气的飞行似乎是个不可能实现的梦想。
But it is worth remembering that just over a century ago, heavier-than-air flight seemed an impossible dream.
上海总会建成于一个世纪以前，曾是英国殖民大亨们频繁光顾的场所。
Built a century ago as the Shanghai Club, it was frequented by British colonial tycoons.
然而几个世纪以前，兰花还是稀有珍贵之物，如今在许多家庭和办公室里都可以见到。
While considered rare and valuable some centuries ago, they may be seen today in many homes and offices.
两个世纪以前，英国在纺织行业处于领先，老字号公司从那时起就开始提防别人。
Britain bounded ahead in textile production two centuries ago, and established firms have been looking over their shoulder ever since.
她是英国人，在那时--半个世纪以前，她成为我们这个爱尔兰海滨小镇的“外星人”。
She was English, which in those days — we are speaking of half a century ago — made her an exotic species in our little Irish seaside town.
早在半个多世纪以前社会学家与人类学家就对这个话题展开了争论。
Sociologists and anthropologists have been debating this topic for over half a century.
伦敦作为商贸中心的基础可以追溯到许多世纪以前。
London's roots as a centre of commerce stretch back many centuries.
直到19世纪以前，硬鞋踢踏舞在整个苏格兰广受欢迎。
Up until the 19th century, hard-shoe step-dancing was enjoyed all over Scotland.
他的口音半世纪以前就都该了，可是现在又回来了。
He'd purged most of his accent nearly half a century ago, but now it had returned.
他的口音半世纪以前就都该了，可是现在又回来了。
He'd purged most of his accent nearly half a century ago, but now it had returned.
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