(informal)there is practically no limit (to something such as a price that can be charged or the opportunities afforded to someone)(非正式)实际没任何限制，一切都是可能的
to the skies
very highly; enthusiastically高昂地；热情地
under the open sky
out of doors露天，室外
柯林斯高阶英汉双解学习词典释义
N-VAR
天;天空
The sky is the space around the earth which you can see when you stand outside and look upwards.