calm air
无风
平静大气
例句与用法：
She attempts to calm them down only made matters worse.
她设法使他们平静下来，不想却适得其反。
The calm sea gave no hint of the storm that was coming.
平静的海上没有一点迹象显示暴风雨即将来临。
You should keep calm even in face of danger.
即使面临危险，你也应当保持镇静。
It was a beautiful morning, calm and serene.
那是一个宁静、明媚的早晨。
词形变化：
副词: calmly | 形容词比较级: calmer | 形容词最高级: calmest | 名词: calm-ness | 动词过去式: calmed | 动词过去分词: calmed | 动词现在分词: calming | 动词第三人称单数: calms |