leading edge
noun
1- the front edge of something, in particular前缘, 尤指：
1.1
- Aeronautics the foremost edge of an aerofoil, especially a wing or propeller blade【航空】机翼翼面或螺旋桨叶片的前缘。
1.2
- Electronics the part of a pulse in which the amplitude increases【电子】前沿（脉冲信号振幅上升的部分）
1.3
- the forefront or vanguard, especially of technological development（尤指科技发展的）前沿（或最先进领域）, 前驱：
as modifier leading-edge research.前沿研究。