In the dark green grass, fish forced to flip a shiny body, gills flapping up and down constantly.
在暗绿色的草地上，大鱼用力地翻动着闪闪发亮的身体，鱼鳃不停地上下扇动。
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。
She walked up and down, flapping her arms to keep warm.
她来回走动，挥动着双臂使身体暖和起来。
Some scientists argue that feathered dinosaurs evolved flight from the ground up, flapping their feathered arms as they ran.
一些研究者认为羽毛恐龙是从零开始进化出飞行能力的，它们在奔跑中会拍动自己带羽毛的前肢。
It followed them, flapping double time, until it caught up, until it joined the last end of the elegant line.
它紧跟着天鹅，加倍抖动着双翅，终于赶上它们并变为了那条优美线条最后的一个点。
Furiously flapping, a chukar partridge speeds up a ramp at the University of Montana flight lab.
在蒙大拿大学飞行实验室中，一只石鸡拼命扇动翅膀加速冲上斜坡。
The little boy's father began to cry as he watched his beautiful little crippled son flapping his arms up and down in the wind, all the while yelling at the top of his voice
不久风就从两位小男孩的脸上呼啸而过。看着自己的跛腿天使上下扇动着臂膀，用尽全力地大声呼喊：“我会飞了，爸爸，我会飞了!”
He picked up crumbs outside the baker's door when the baker was not looking and tried to keep himself warm by flapping his wings.
他只好趁面包师不注意的时候，从面包店门口弄点面包屑充饥，并扑扇着翅膀为自己取暖。
Based on the mass properties of each component of a flapping vehicle are generally measurable and constant we set up the corresponding equations of motion for flapping flight.
基于各部件质量的可测性且为常数的特点建立相应的扑翼运动方程。
He turned and fled across the water-front, a meagre shadow in a flapping overcoat, with Martin straining to keep up with him.
他转过身来，他那外衣飘闪的瘦削的身影飘过了海岸，马丁努力跟着。
He turned and fled across the water-front, a meagre shadow in a flapping overcoat, with Martin straining to keep up with him.
他转过身来，他那外衣飘闪的瘦削的身影飘过了海岸，马丁努力跟着。
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