内在动力【英】

internal force

译文来源

http://d.wanfangdata.com.cn/Periodical/bjzb-e201239019

例句

1. 这是中非关系发展的内在动力。——《巩固友谊、深化合作，携手共创中非关系更加美好的明天》

1. Such common interest is the internal force that drives the growth of Africa relations.—Quoted fromFriendship and Cooperation for a Better Future of China Africa Relations