linear distance between the extremities of an airfoil
wing span的用法和样例:
例句
The pilot first set the span dial to the known wingspan of his prospective target, then the range dial to the maximum for accurate fire. 飞行员首先把宽度转盘设置到他预期的目标的的翼展宽度,然后距离转盘到精确开火的最大值。