ridgeboard 英 ['rɪdʒbɔːd] 美 ['rɪdʒˌbɔːd] 基本解释 n.=ridgepole 同首字母单词 ra [ˈrɑː] raa raad ['rɑːd] raaf rabassaire [rəbə'seər] rabat rabaul rabbah rabbanist rabbanite rabbath rabbet ['ræbɪt]