名词
中文翻译：Unknown
同义词：
['boring', 'dull', 'monotonous']
例句：
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1. The lecture was so boring that I couldn't concentrate.
那个讲座太无聊了，我听不进去。
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2. She always wears the same outfit, which is quite dull.
她总是穿同样的服装，这很单调。
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3. The garden was a bit boring without the flowers, but now it's full of life again.
花园里没有花的时候有点单调，但现在又充满了生机。