translation.en: So when one ant meets another, or when it meets a chemical deposited on the ground by another, then it changes direction to follow in the direction of the interaction, and that's how you get the trail of ants sharing your picnic.
translation.zh: 所以当一只蚂蚁遇见另一只蚂蚁, 或是另一只蚂蚁沿路留下的 化学气味, 然后它就会改变自己的方向 冲着接触方提供的方向去搜寻 这就是为什么能够有一只蚂蚁大军 与你分享野餐的原因.