1. Even his opponents were compelled to admit that he was a man of profound learning: and this not merely in his special field of economics, but also in history, philosophy, and the literature of all countries.
    即使是他的对手们也不得不承认他是一个学识渊博的人：这不仅是指他的经济学专业领域，而且还包括历史、哲学以及各国的文学。

2. Economics
    经济

3. This new leadership has abandoned all talk of economic imperialism in favor of market economics.
    这些新领导人赞成市场经济学，摈弃了所有有关经济帝国主义的言论。

4. He is distinguished for his knowledge of economics.
    他在经济学方面的研究出类拔萃。

5. He has written three books in economics.
    他已写了三本经济学方面的书。