地动的英文：
ground movement
ground-motion

参考例句：

His beard waggled as he ate
他的胡子来回地动，好像他在吃。

To move about or to and fro rapidly and gracefully;flit.
快速优雅地来回移动;轻快地动

Bill begins to pluck aimlessly at grass and little sticks
比尔心神恍惚地动手拔草和折小树枝。

Nim's lips moved silently, stumbling over the ancient aramaic words.
尼姆的嘴唇无声地动着，结结巴巴地背着古老的亚拉姆语的词句。

Mrs. Tu nodded and looked towards the entrance, moving her lips as she silently recited Buddhist sutras
姑太太点头，眼睛也望着外边，嘴唇翕翕地动:在那里念佛！

Armed with the right tools and materials, newly-weds gaily embark on the task of decorating their own homes
新婚夫妇备有合适的工具和材料便高高兴兴地动手装饰自己的新房。

"He had luck and much agility and unusual strength, that he should have thus saved himself from such a pass."
他靠了运气,轻快敏捷地动作和超凡出群的气力,才在这样一场灾祸中救出自己。

Bill saw before him a fat pigeon to pluck,and he proceeded gaily to the task.
比尔看到在他面前有个傻里傻气的人大有钱财可骗，于是就得意地动起手来。

ground是什么意思：
n. 地面，土地
v. 着陆， 打基础
adj. 磨平的，磨碎的

on solid ground
在稳固的基础上

Their ship was grounded.
他们的船搁浅了。

The ground has thawed.
地面解冻了。

movement是什么意思：
n. 运动，转动，活动

This is a democratic movement.
这是一场民众运动。

Every movement has its partisans.
每一运动都有热情的支持者。

free movement to music
伴着音乐的优美动作

motion是什么意思：
n. 运动；动作；提议；动机
v. 以姿势向某人示意

The train was in motion.
火车开动了。

The motion was withdrawn.
那项动议被撤销了。

The backwards motion is the anticipation, the throw itself is the motion.
这个向后的动作就是预备动作，投掷就是动作本身。