An outgoing forager doesn't go out unless it gets enough interactions with returning foragers, and what you see are the returning foragers going into the tunnel, into the nest, and meeting outgoing foragers on their way out.
一个准备外出的觅食者不会轻易外出, 除非得到了足够的归巢的觅食者的反馈, 你现在看到的是回来的觅食者, 在通过蚁巢的管道进入蚁穴时, 跟沿路准备外外出的蚂蚁进行交流.