形容词
中文翻译：Unknown
同义词：
['uninteresting', 'unexciting', 'lackluster', 'uninspiring']
例句：
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1. Themovie was so dull that I couldn't even finish it.
这部电影太无聊了，我甚至看不完。
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2. His writing style is quite dull, lacking in creativity.
他的写作风格相当枯燥，缺乏创造力。
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3.The music was so dull that I couldn't stand it for more than a few minutes.
那音乐太单调了，我最多坚持几分钟就受不了了。