名词
中文翻译：Unknown
同义词：
['blue', 'beautiful', 'precious']
例句：
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1. The blue sky is a perfect background for the sunset.
那片蓝色的天空是日落的完美背景。
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2. She has a beautiful smile that makes her look younger.
她有一个美丽的微笑，让她看起来更年轻。
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3. The precious gemstones were sold at auction for a high price.
这些珍贵的宝石在拍卖会上以高价售出。