四级词汇

British spelling of wagon; a four-wheeled vehicle for hauling loads

（英式）四轮运货马车，货车

Widely known or famous

众所周知的，著名的

Spanning the entire world; globally

遍及全世界的；在全球范围内

High-energy radiation used to image internal body structures; to examine with such radiation

X射线；用X光检查