Today AAA's tow trucks have replaced the four legged rescue teams of yore. 如今，美国汽车协会的拖车已经取代了昔日的四条腿的救援队。
To construct legged vehicles that could roam Mars, researchers studied insects, not to learn how to build legs, but to figure out how insects coordinated six legs in real time. 为了建造一个能够在火星上漫游的多腿车，研究者们对昆虫进行了研究，其目的不是为了学会如何做腿，而是要搞清楚昆虫是如何做到实时协调六条腿的运动。
美
['θriːlegd]
