But mimicry’s success in nature depends on the ratio of the original to the ersatz. If there are too few of the original, the profile loses its significance, and its protective value vanishes.
但自然界中模拟的成功取决于原版和替代品之间的比例。原版太过稀少的形象就会失去意义，与之相关的保护价值也会大打折扣。