tractor/'træktə^r $ -tər/

n. a strong vehicle with large wheels that is used on farms

n. [C] 拖拉机：Before the First World War, farmers used to use horses instead of tractors. 第一次世界大战之前，农民用马而不是拖拉机。

构词tract + -or

音组-ctor/-ktə^r $ -ktər/

actor; director; doctor; tractor