He drew back the tent flap and strode out into the blizzard.
他拉开帐篷的门帘，大步走进了暴风雪中。
《柯林斯英汉双解大词典》
2
Now is your chance to find out! Put both feet in, get in the water, and feel how it is to flap instead of kick.
现在是你发现的机会！双脚都伸进去，入水，感受拍打而不是踢腿的感觉。
3
Like a blues musician tapping his foot to the music, zebrafish can learn to flap their tails to the rhythm of a flashing light — and remember the beat after the light has gone out.