The cutting edge:
The most modern stage of development in a particular type of work or activity.
“The cutting edge” 指 “发展前沿”，它的形容词形式是 “cutting-edge”，意思是 “现代、先进的，处于领先地位的”。
例句
This new smartphone is at the cutting edge of mobile phone design.
这款新型智能手机处于手机设计的最前沿。
The company is at the cutting edge of scientific research.
这家公司处于科研的前沿。
Robotic surgery uses the latest cutting-edge technology.
机器人外科手术使用最新的尖端技术。
