Britain has always been the principal source—ninety percent of Australians are of British descent, and Britain has provided one million migrants since the Second World War.
英国一直是澳大利亚移民的主要来源国——90%的澳大利亚人是英国后裔，自二战以来，英国已经提供了100万移民。
Student fees are their principal source of income.
学费是它们的主要收入来源。
Incomplete combustion is the principal source of man-made carcinogens.
不完全燃烧是人为致癌物的主要来源。
As in Asia, contact with infected birds is the principal source of infection.
如同在亚洲一样，接触受感染的禽鸟是主要感染源。
Natural gas is already the principal source of heat in half of American households.
天然气已经是美国大半家庭的主要热能来源。
The posttraumatic hydrothermal solution is the principal source of ore-forming fluid.
断裂和岩浆岩是两大重要的成矿地质条件。
Differences such as these, claimed Porter, are a principal source of competitive advantage.
波特认为，正是这些不同，成为了这两家公司的竞争优势。
Membership Fee is the principal source of income for the association. It must be set carefully.
会员费是社团的最主要收入来源，所以必须慎重决定。
The fourth aortic arch of vertebrates, which is the principal source of the blood supply to the body.
脊椎动物的第四大动脉弓，是向全身输送血液的主要动力。
The boom in intellectual property has been good for the Patent Office; patents are its principal source of income.
知识产权的兴盛对专利局是有利的；专利是他们的主要收入来源。
Today, racing Akhal-Tekes and maintenance of the breed itself is a principal source of national and cultural pride.
今天，赛车阿哈尔特克斯和维护该品种本身是一个国家和文化自豪感的主要来源。
'Diets were rich in fruits and vegetables, ' she said. 'Fish was the principal source of protein. People drank water. '
她说，当时人们的膳食中多蔬菜水果，鱼是蛋白质的基本摄入来源。水是人们的饮品。
Information reported to WHO suggests that close contact with diseased or dead pigs is the principal source of human infection.
向世卫组织报告的信息表明与病猪或死猪密切接触是人感染的主要感染源。
As Akers argues, the direct attack on the Priests' principal source of livelihood, the animal sacrifices, could not be ignored.
正如埃克斯所说，不能忽视对祭司们的主要生活来源-动物祭祀的直接攻击。
Some experts even believe that mobile video phones will surpass television to become the principal source of video information.
有些专家甚至认为移动视像电话将超过电视，成为主要的视频信息来源。
All evidence to date indicates that close contact with sick or dead birds is the principal source of human infection with the H5N1 virus.
迄今的所有证据表明，与病禽或死禽密切接触是人类感染H5N1型病毒的主要原因。
His major work, Ecclesiastical history of the English Nation (731), is still the principal source for English history up to that time.
他的主要作品《英格兰人教会史》(731)仍然是到那时为止的英国历史的主要资料来源。
So are all vegetables as a caloric percentage, though they don't have enough calories to sustain most people as a principal source of sustenance.
因此，所有的蔬菜都含有一定比例的热量，尽管大多数人认为他们所含有的热量不足以承担热量源泉的角色。
In many African countries, agriculture remains the principal economic activity, and agricultural products are the principal source of export trade.
在许多非洲国家，农业仍是主要的经济活动，农产品是主要的出口贸易产品。
The Fed has created its own Office of Financial Stability Policy and Research, with 20 staff, which will be a principal source of expertise for the FSOC.
联储局已成立了自己的金融稳定政策与研究办公室，有20名成员，他们将成为金监会主要的专家来源。
Power system use synchronous machines for generation of electricity, in other words, synchronous generators form the principal source of electric energy in power systems.
电力系统使用同步器来发电，换句话说，同步发电机是电力系统中电能的主要来源。
By the influence of river course, underwater distributary channel distributes alternating with interdistributary bay which forms the principal source-reservoir-seal assemblage mode.
受河道迁徙冲刷影响，水下分流河道和分流间湾相间分布，形成研究区主要生储盖组合形式。
It is also a raw material for many industrial materials, including fertilizers, explosives, chloroform, carbon tetrachloride, and carbon Black, and is the principal source of methanol.
甲烷也是许多工业材料的原料，包括肥料、炸药、甲醇、氯仿、四氯化碳以及碳黑等。甲烷是甲醇的主要来源。
In many parts of the world renewable energy is already a principal energy source.
在世界许多地方，可再生能源已经是一种主要的能源来源。
Combine a loan from your friends with other funding sources to create a dynamic portfolio. You should not draw too heavily on one source to avoid excessive interest rates on high principal.
把从朋友处贷的款和其他资金来源整合在一起，制作一份动态的卷宗，你不能为避免高本金应付的过多利息而只动用一个资金来源。
The principal metabolic pathway of RBC is glycolysis, and the main energy source in most species is glucose.
红细胞的主要代谢途径是糖酵解，而大多数物种的主要能量来源是葡萄糖。
The principal metabolic pathway of RBC is glycolysis, and the main energy source in most species is glucose.
红细胞的主要代谢途径是糖酵解，而大多数物种的主要能量来源是葡萄糖。
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