motor boat 短语 词形变化 motor boats 复数 释义与例句 n. 1. Alternative form of motorboat. 词汇关系 名词 同义词 1 powerboat 上位词 1 boat 下位词 10 launch scooter cruiser speedboat outboard cabin cruiser pleasure boat pleasure craft sea scooter water scooter 部分词 5 ice windshield helm windscreen internal combustion engine