adj.无云的；晴朗的
The sky is quite blue and cloudless. 天空蔚蓝,明净无云。
The sun shone brightly in a cloudless sky. 太阳在无云的天空中明亮地照耀着。
It's a cloudless day today. 今天天气晴朗。
My friends and I went to the park together on a cloudless day. 在一个晴朗的天气里，我和朋友们一起去公园。
