sloop基本解释

n,[船]单桅帆船,同近

This means that the mainsail and head sail of a ketch are generally smaller than on a sloop, but the mizzen sail roughly makes up the difference..这意味着双桅帆上的主帆和前帆通常要比单桅帆船上的小一些，而尾桅帆的面积则恰好弥补了这一差距。

单桅帆船英释中释na small ship with one central mast (= pole for sails )