impetus

• n. 动力；促进；冲力

im-,进入，使，-pet,追逐，冲击，词源同compete,appetite.引申词义推动，促进，刺激等。

impetus (n.)

early 15c., impetous "rapid movement, rush;" 1640s, with modern spelling, "force with which a body moves, driving force," from Latin impetus "attack, assault, onset, impulse, violence, vigor, force, passion," related to impetere "to attack," from assimilated form of in- "into, in, on, upon" (see in- (2)) + petere "aim for, rush at" (see petition (n.)).

1. This is the primary impetus behind the economic recovery.

这是促使经济复苏的主要动力.

来自《简明英汉词典》

2. The treaty gave a fresh impetus to trade.

这条约使双方的贸易又推进了一步.

来自《简明英汉词典》

3. Children need an impetus to study.

儿童学习需要动力.

来自《现代汉英综合大词典》

4. This is an encouragement [ impetus ] to us.

这是对我们的 鞭策.

来自《现代汉英综合大词典》

5. Her speech gave an impetus to my ideas.

她的讲话激发了我的思绪.

来自《现代英汉综合大词典》