1.The sun's ultraviolet-B rays absorbed through the skin are the body's main source of this nutrient.
人体获得维生素D的主要来源是通过皮肤吸收太阳的中波紫外线。
2.A year ago, her blog started generating enough advertising revenue to become the main source of income for her family.
一年之后，这一博客产生的广告收入已成为了海瑟一家人生计的主要来源。
3.Thousands of trucks have been stranded by the side of the road, one main source of transportation for movement among migrants.
作为运送迁徙者的主要工具，成千上万辆卡车被迫在公路边抛锚。
4.Rice is often the main source of employment, income and nutrition in many poor, food insecure regions of the world.
在世界上许多贫困和没有粮食安全的地区，稻米常常是主要的就业、收入和营养来源。
5.The main source of students' motivation is how much they value what they are learning in school.
学生的学习动机主要来源是他们怎样看待自己在校学习的价值。
6.Networks that run IP are left with one main source of distinction: how much connectivity they provide.
IP网络之间的区别只剩下了一点，那就是它们提供的连接有多有少。
7.The difference, or carry, would be the main source of return; if the bonds rose in price as well, so much the better.
其中的差额或携带将是回报的主要来源，如果债券的价格上扬那就更好了，多多益善。
8.Make sure people are using it a one of there main source of Release data.
是保证人们使用了发布数据的主要资源之一。
9.Food and beverage department is one of the most competitive departments in a hotel and the main source of its favorable economic benefit.
对饭店而言，餐饮是最具竞争力的部门之一，也是饭店良好经济效益的主要来源。
10.It took Google a while to come up with a way of making money, but it found one in advertising, its main source of revenue.
在营利模式上，Google花费了不少周折，不过他找到广告这条生财之道，而广告也成了他主要的收入来源。