名词
中文翻译：二副
同义词：
['second officer', 'second-class officer']
例句：
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1. Thecaptain's second mate is in charge of the ship's navigation.
船长的二副负责船舶导航。
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2.The second mate was responsible for ensuring the safety of all passengers.
二副负责确保所有乘客的安全。
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3. During the voyage, the second mate had to deal with many emergencies.
在这次航行中，二副不得不处理许多紧急情况。