单词：diffuse nebulae
diffuse nebulae的用法和样例：
例句
- Around the cluster is a huge vague diffuse nebulae.围绕该星团的是一个巨大的模糊的弥漫星云。
- You can see nebulae in the clear summer sky.在晴朗的夏夜可以看到天上的星云。
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