扑打的英文：
beat; pat; swat
To flap,especially wings.
振翅，鼓翼扑打，尤指扑打翅膀
A moth was fluttering round the lamp
有一只蛾子扑打著翅膀绕著灯飞
The swimmer who had got a cramp in the leg beat about in the water,trying desperately not to drown.
那个游泳者腿部抽筋，在水中乱扑打，拼命挣扎以求免于溺死。
n. 打；心脏跳动；滴答声；照射
v. 打；打败；使沮丧；诈骗；艰难的前进；滴滴答答
adj. 疲乏的；大吃一惊的；破旧不堪的
subcarrier beat
副载波差拍
intercarrier beat
载波差拍干扰
a policeman's beat
警察的巡逻路线
v.
（喜爱地）轻拍
n.
1.（友善的）轻拍，拍打
2.一小块黄油
adj.
过于简易的，不自然的，油滑的
adv.
胸有成竹地
a pat of Butter
一小块黄油
The answer came pat.
答案马上出来了。
They've got the system down pat. He has the lesson pat.
他们开始认真考虑这种制度。他对这课学得很快