stimulus

名词 stimulus:

1. any stimulating information or event; acts to arouse action
   同义词：stimulation, stimulant, input

1. Her words of praise were a stimulus for people to work harder.
   她赞扬的话鼓舞人们工作更努力。
2. The nutrient in the soil acts as a stimulus to growth.
   土壤中的养分能促进植物生长。