动词
中文翻译：上船
同义词：
['aboard', 'board', 'on', 'embark']
例句：
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1.She was onboard the ship before it set sail.
在船启航前，她已经登上了船。
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2. The pilot instructed passengers to board the plane safely.
飞行员指示乘客安全登机。
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3.The train was already on its way when she got onboard.
当她上车时，火车已经出发了。