United States coastguard icebreaker left port in Alaska last week to join a Canadian icebreaker to conduct a seismic survey of the Beaufort seabed north of the Yukon-Alaska border.是什么意思_United States coastguard icebreaker left port in Alaska last week to join a Canadian icebreaker to conduct a seismic survey of the Beaufort seabed north of the Yukon-Alaska border.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句