And what they do is, when there are many ants in a small space, then each one can search very thoroughly because there will be another ant nearby searching over there, but when there are a few ants in a large space, then they need to stretch out their paths to cover more ground.
它们是这么做的, 当搜索空间小而蚂蚁很多时, 它们会搜寻的非常彻底 因为它们知道临近的区域 有别的蚂蚁在搜索, 但是当搜索面积很大 且蚂蚁很少时, 它们会扩张自己的搜索路径 去覆盖更大的面积.