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- Tourism is a major source of income for the area. 旅游业是这个地区的主要收入来源。
- Milk is the major source of calcium for babies. 牛奶是婴儿获取钙质的主要来源。
- Books are her major source of enjoyment. 书籍是她快乐的主要源泉。
- Tourism is the major source of this town's revenue. 旅游业是这个小镇主要的收入来源。
- Small rodents are a major source of zoonoses. 小型鼠类动物是人蓄共患病的源头。
- Mr. Williams is the major source of donations. 威廉姆斯先生是捐款的主要出资人。
- An overcrowded workplace can be a major source of stress. 拥挤的工作空间可能是压力的主要来源。
- The UN says dirty air is a major source of metal in crops. 联合国称污染的空气是农作物中金属成分的主要来源。
- Commercial banks have been a major source of loans to agriculture. 商业银行曾是对农业的主要贷款来源。
- Confucianism is one of the major sources of the Chinese culture. 孔子思想是我国文化的主要源头之一。
- Extramarital infection was the major source of STD transmission. 非婚性接触是性病传播的一个最主要感染源。
- It is also a major source of land and water degradation. 它还是土地和水资源退化的一大根源。
- We count on tourism being the major source of income. 我们把旅游业当作主要收入来源。
- Tourism is a major source of income for the people of Thailand. 观光是泰国人很重要的收入来源。
- Fish was a major source of protein for the workingmen. 对这些工人来说,鱼是蛋白质的主要来源。
- That has been a major source of heartburn for educators. 这一法令成为广大教育者的心头痛。
- Magazines no longer look to their subscribers as the major source of revenue. 杂志不再依靠其订户为主要收入来源。
- Newspapers no longer look to their subscribers as the major source of revenue. 报纸不再依靠订户为其主要收入来源。
- The designer chooses the layout of reinforcement. 设计者选择钢筋布置。
- The farm is a major source of jobs for the small community of El Petacal. 该农场是培塔可地区当地居民的主要工作机会来源。