名词
中文翻译：Unknown
同义词：
['northward wheel', 'north-facing wheel例句：1. The astern wheel is the part of a ship that faces towards the rear.（船的后部轮是面向船尾的部分。）']
例句：
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1. The astern wheel is the part of a ship that faces towards the rear.
船的后部轮是面向船尾的部分。
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2.The astern wheel is used to steer the ship in a straight line.
后部轮用于使船只保持直线行驶。
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3. The astern wheel was designed to improve the stability of the ship.
后部轮的设计旨在提高船只的稳定性。