历史学
贫困化
Their education level was very low, and they only did some low-paid job, this had caused pauperization of their life.
他们的受教育程度很低，基本都从事一些低回报或临时性的工作，这造成了他们生活的贫困化。
经济学
生物学
杂种弱势
杂交弱势
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。