desire 与ambition用法的异同

desire （n）
1. craving: a wish, craving, or longing for something
2. something wished for:
something that or somebody who is wished for (formal)
3. sexual craving: a strong wish for sexual relations with somebody
从Encarta字典里面的英文解释可以看出desire主要偏重的是长期的想法/希望，想要获得某件东西，或者有想要和某人发生关系的欲望。

ambition（n）
1. desire for success: a strong feeling of wanting to be successful in life and achieve great things
She lacks ambition.
2. objective or goal: a goal or objective that somebody is trying to achieve
而ambition强调的是达到成功的欲望或者是野心，偏重对既定目标的追求。