Independent pitch and yaw of the two birds produce noise.两只吊舱的独立俯仰和偏航均会产生噪声.Pitch - yaw coupling can be neglected only for nearly axisymmetric vehicles.只有对接近于轴对称的飞行器,俯仰与偏航的耦合才能略去.The integrated guidance autopilot model o...

I felt so sleepy I couldn't stop yawning.我感到很困,止不住地打呵欠.Higgins begins half singing half yawning an air from La Fanciulla del Golden West.息金斯一边打着呵欠,一边唱着当时流行的小调.There's a yawning gap between rich and poor.贫富之间有一条...