形容词
中文翻译：安静的
同义词：
['quiet', 'serene', 'tranquil']
例句：
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1. The room was so quiet that we could hear the sound of our own breathing.
房间非常安静，我们能听到自己的呼吸声。
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2. She sat quietly in her chair, lost in thought.
她静静地坐在椅子上，陷入了沉思。
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3. The tranquil river flowed peacefully through the valley.
宁静的河流在山谷中平静地流淌。