1. The unconscious is certainly the source of instinctive activity. But in creative thought the unconscious is responsible for the production of new organized forms from relatively disorganized elements.
    潜意识无疑是本能活动的源泉。不过，在创造性思维过程中，正是潜意识使得相对无序的成分变成新的有序形式。

2. He has pointed out that the tree is a useful source of income, as tourists have been coming from all parts of the country to see it.
    他指出，由于人们从全国各地纷纷前来参观这棵树，它成了一个有用的财源。

3. However, teacher prejudice isn't the only source of classroom difference.
    但是教师的偏见不是造成课堂得分差别的唯一原因。

4. Arrange an auxiliary cooking and heating source that can be used outside. One alternative is a portable camp stove with small cans of gas.
    放置一个备用的户外烹调和取暖用具，或者准备一个便携式露营灶和几小罐煤气。

5. And by altering the proteins on the surfaces of animal organs to make them more like human organs, scientists believe they may be able to create a plentiful source of organ donors for people.
    而且科学家们相信，通过改变动物器官表面的蛋白质，它们更像人类器官，就能够找到一个为人类提供器官的丰富来源。

6. SAN FRANCISCO (CNN) — For generations of students, writing term papers has been a major source of nerves and frustration, if not the ultimate homework nightmare.
    旧金山（美国有线新闻电视网）--对一代又一代的学生来说，写学期论文即使不是最可怕的作业，也至少一直是让他们头疼和沮丧的主要原因。

7. Mum or dad, of course, provide a regular supply of pocket money, but uncles and aunts are always a source of extra income.
    爸爸妈妈当然经常给孩子零花钱，但是，叔舅婶姨也是孩子们额外收入来源。

8. Car alarms constantly scream at us in the street and are a source of profound irritation.
    在街上，汽车的防盗警报不断对我们吼叫，这是人们极度烦燥的一个原因，

9. Refuse politely any cold drink from an unknown source.
    应谢绝任何不明来源的冷饮。

10. Observers say the program has succeeded in strengthening the country’s agricultural base and bringing a new source of wealth to villagers.
    观察家们称该计划已成功地巩固了该国的农业基础，而且还给村民们带来了新的财源。