副词
中文翻译：免得
同义词：
['avoid', 'lest', 'for fear of']
例句：
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1. I'll never forget the day we met, lest it should be forgotten.
我永远不会忘记我们相遇的那一天，免得被遗忘。
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2. She was afraid to speak up in class, lest she offend her teacher.
她害怕在课堂上发言，以免得罪老师。
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3. The children were warned not to touch the hot stove lest they burn themselves.
孩子们被警告不要触摸热炉子，以免烧伤自己。