当其它的蚂蚁来到十字路口，它们只会跟着气味强烈的那条路走，也就是那条最新标记出来的穿过十字路口的路。
When other ants come to an intersection, they always follow the path with the strongest scent, which is the most recent path that leads away from the intersection point.
很明显，气味可以引起强烈的情绪反应。
It became apparent that smell can evoke strong emotional responses.
当灰尘或强烈的气味进入你的鼻子时，你就会打喷嚏。
When dust or a strong smell gets into your nose, you sneeze.
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