synergism An ecological association in which the physiological processes of behaviour of an individual are enhanced by the nearby presence of another organism(一个生态协会，其中一个人的行为的生理过程是由附近的另一种生物的存在而得到增强。)
synergistic effect of toxic substances 1. A state in which the combined effect of two or more substances is greater than the sum of the separate effects. 2. An effect whereby two toxic substance together have more of an impact than anticipated(1. 在一个国家里，两个或两个以上的物质结合效果总和比单独作用的效果强。 2. 作用，使两种有毒物质具有一个共同的影响比预期的更强。)
