形容词
中文翻译：单调的
同义词：
['dull', 'monotonous']
例句：
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1. The music was so boring that I couldn't listen to it for more than five minutes.
音乐太无聊了，我听不了五分钟。
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2. The speaker's voice was too monotonous, making the presentation feel repetitive.
演讲者的声音太单调了，使得整个演讲感觉重复。
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3. The old painting on the wall was so dull that it barely looked like a painting at all.
墙上的那幅旧画太单调了，几乎看不出是一幅画。