名词
中文翻译：Unknown
同义词：
['step-sibling', 'step-relative']
例句：
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1. He's a stepbrotherto my sister, and we'reclose friends.
他是我的姐姐的继兄弟，我们关系很好。
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2. They had a stepbrother who helped them with their homework.
他们有一个帮助他们做作业的继兄弟。
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3. The stepbrother is helping his sister with herstudies.
这个继兄弟正在帮助他的妹妹学习。