1. 寄养的;代养的
    Foster parents are people who officially take a child into their family for a period of time, without becoming the child's legal parents. The child is referred to as their foster child.

    e.g. Little Jack was placed with foster parents...
           小杰克和养父母住在一起。
    e.g. The foster mother was a wonderful, warm person.
           寄养母是一个很不错的热心人。

2. 寄养;代养
    If you foster a child, you take it into your family for a period of time, without becoming its legal parent.

    e.g. She has since gone on to find happiness by fostering more than 100 children.
           从那以后她代养了 100 多个孩子，并从中得到快乐。

3. 促进;鼓励;培养
    To foster something such as an activity or idea means to help it to develop.

    e.g. He said that developed countries had a responsibility to foster global economic growth to help new democracies...
           他说，发达国家有责任促进全球经济增长，以帮助新兴民主国家。
    e.g. Its cash crisis has been fostered by declining property values.
           地产贬值引发了现金危机。