详细解释:n. 主桅
英语解释：
名词 mainmast:
the chief mast of a sailing vessel with two or more masts详细解释：
main.mast
n.Nautical （名词）【航海】 The principal mast of a vessel.主桅：船舶的主要桅杆The taller mast, whether forward or aft, of a two-masted sailing vessel.主桅：双桅帆船中较高的桅杆，无论是位于船头的还是船尾的The second mast aft of a sailing ship with three or more masts.主桅：有三根桅或更多桅帆船的第二根船尾桅