counter fire是什么意思

用法例句

The paper gives a formula and a calculating method for the increased value of final turn altitude in dead engine landing on two different conditions:head wind makes the gliding distance shortened,head wind makes the position of final turn move backward.

以微分形式 ,推导出了在停车迫降中 ,逆风会使下滑距离缩短、飞机四转弯改出位置后移两种情况下四转弯改出高度的增量公式及计算方法。