With a downward haul on the signal halyards, this order was executed, convoy PQ 17 ceased to exist, and Commodore Downing gave up his command.是什么意思_With a downward haul on the signal halyards, this order was executed, convoy PQ 17 ceased to exist, and Commodore Downing gave up his command.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句