Has the vessel Operator submitted a Vessel Spill Response Plan to the US Coast Guard, which has been approved by official USCG letter?是什么意思_Has the vessel Operator submitted a Vessel Spill Response Plan to the US Coast Guard, which has been approved by official USCG letter?在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句