形容词
中文翻译：不启蒙的
同义词：
['uninstructive', 'uninspiring']
例句：
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1. The book was unenlightening and left me feeling confused.
这本书很无趣，让我感到困惑。
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2. Theteacher's lecture was unenlightening and lacked relevance to the topic.
老师的讲解没有针对性，让人感觉无聊。
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3.The presentation was unenlightening andfailed to engage the audience.
这个演讲没有吸引力，没能吸引听众。