The Automatic Identification System(AIS) is a new kind of navigation aid and its installation has been mandatory by the IMO MSC 73 conference.是什么意思_The Automatic Identification System(AIS) is a new kind of navigation aid and its installation has been mandatory by the IMO MSC 73 conference.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句