A stimulus is something that encourages activity in people or things.
例句
Interest rates could fall soon and be a stimulus to the US economy...利率可能很快就会下调,从而刺激美国经济。It is through our nervous system that we adapt ourselves to our environment and to all external stimuli.我们是通过神经系统使自己适应环境及所有外部刺激的。
英汉词典释义
n.
刺激物; 激励物; 促进因素
Light is a stimulus to growth in plants.光是促进植物生长的一个因素。
英英词典释义
Noun
1. any stimulating information or event; acts to arouse action