柯林斯词典excavator /ˈɛkskəˌveɪtə/ (excavators) 1. N-COUNT An excavator is a large machine that is used for digging, for example, when people are building something. 挖掘機 返回 excavator剑桥词典UK (US steam shovel) a large , powerful machine with a container connected to a long arm , used for digging up the ground 挖土機；挖掘機 返回 excavator