名词
中文翻译：Unknown
同义词：
['jackknife mast', "jackknife boom例句：1. The sailors used the jackknife mast to repair their ship's sails.（水手们用杰克刀桅杆来修理他们的船帆。）"]
例句：
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1. The sailors used the jackknife mast to repair their ship's sails.
水手们用杰克刀桅杆来修理他们的船帆。
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2. The jackknife mast was a crucial part of the ship's design.
杰克刀桅杆是这艘船设计中至关重要的一部分。
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3.The crew had to use the jackknife mast to navigate through the stormy seas.
船员们不得不使用杰克刀桅杆在暴风雨的海面上航行。