此“once”在句中的准确理解"once"在下句中是什么用法?The real function of new inventions will only be known once we discover new ways of thinking about the technology.

问题描述:

此“once”在句中的准确理解
"once"在下句中是什么用法?
The real function of new inventions will only be known once we discover new ways of thinking about the technology.