clear; with no clouds 晴朗的；无云的 a cloudless sky 晴朗的天空
Extra ExamplesTopics Weatherb2an almost cloudless sky. 几乎万里无云的天空。 It was a beautiful cloudless morning. 那是一个美丽无云的早晨。 On a cloudless day you can see for miles. 在无云的日子里，您可以看到英里。 a cloudless blue sky 万里无云的蓝天
Oxford Collocations DictionaryCloudless is used with these nouns:- sky