It would be wrong for us to start flapping about now and say that we didn't know what we were doing.
现在开始动摇，说我们不知道自己在干什么可不对。
A friend of mine who lives in Salaheddine district saw one flapping about in the wind early one morning last week.
上周的一个早晨，一个住在Salaheddine区的朋友看见一面（反对派）旗帜迎风飘扬。
Research on bionics and aerodynamics indicates that flapping mode is better than rotorcraft and fixed-wing mode when they are about the size of small birds.
仿生学和空气动力学研究均表明，对于特征尺寸相当于鸟类或者昆虫的微型飞行器来说，扑翼飞行器要优于固定翼和旋翼飞行器。
About midnight, hearing a strange noise like the flapping up and down of a pot-lid, he sat up in bed, rubbed his eyes, and there was the bewitched tea-kettle covered with fur and sprouting out legs.
半夜的时候，他听到一阵奇怪的响动，好像是壶盖在上下扑腾。修补匠坐起来，揉了揉眼睛，就看到那只成了精的茶釜全身长了毛，正往外伸腿呢。
About midnight, hearing a strange noise like the flapping up and down of a pot-lid, he sat up in bed, rubbed his eyes, and there was the bewitched tea-kettle covered with fur and sprouting out legs.
半夜的时候，他听到一阵奇怪的响动，好像是壶盖在上下扑腾。修补匠坐起来，揉了揉眼睛，就看到那只成了精的茶釜全身长了毛，正往外伸腿呢。
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