Many of the bridges in Africa are suspension bridges. When vehicles drive on them they wave and shake so that they can get rid of the white ants and lengthen the life of the bridge.

• 非洲的许多桥梁是活动的，车子走在上面，桥身便来回摇摆地震颤，这样可以甩掉寄生在上面的白蚁以延长桥梁的寿命。