名词
中文翻译：Unknown
同义词：
['mainmast', 'after boom', 'after yardarm', 'after spar', 'after foremast', 'after mainmast', 'after topsail yard', 'after topgallant yard', 'after topgallant sails', 'after foremast boom', 'after foremast yardarm', 'after foremast spar', 'after foremast', 'after foremast boom', 'after foremast yardarm', 'after foremast spar', 'after foremast.']
例句：
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1.The ship's mainmast is the tallest mast on board.
这艘船的主桅杆是船上最高的桅杆。
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2.The sailors were busy adjusting the after boom to keep the sails in place.
水手们忙着调整后桅索，以确保帆面保持平整。
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3.The captain ordered the crew to repair the after yardarm before the storm hit.
船长命令船员在暴风雨来临前修理后桅桁。