An island group in the western Caroline Islands of the western Pacific Ocean. Discovered by the Spanish in 1791,it became part of a Japanese mandate after1920 and fell to U.S. forces in 1945.是什么意思_An island group in the western Caroline Islands of the western Pacific Ocean. Discovered by the Spanish in 1791,it became part of a Japanese mandate after1920 and fell to U.S. forces in 1945.在线翻译_英语_读音_用法_例句