Internal rotation is accompanied by scapular retraction and associated clavicular movements.是什么意思？

Internal rotation is accompanied by scapular retraction and associated clavicular movements.

内旋转会伴有肩胛骨回缩及相关的锁骨运动.

internal

adj. 国内的，内部的，体内的，内心的；prep. （机构）内部的；n. 内脏，内部器官，本质，本性；

例句
He does not want to interfere in the internal affairs of another country...
他不想干涉别国内政。

rotation

n. 旋转，转动，轮流，循环，[农]轮作，[天]自转；

例句
...the daily rotation of the earth upon its axis.
地球每天绕地轴自转

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

accompanied

v. 陪伴( accompany的过去式和过去分词 )，陪同，伴随…同时发生，伴奏；

例句
She was accompanied by her younger brother...
她由弟弟陪着。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

retraction

--

例句
Internal rotation is accompanied by scapular retraction and associated clavicular movements.
内旋转会伴有肩胛骨回缩及相关的锁骨运动.

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

associated

vt. 合伙，合营，联合，结合，联想；vi. 联系(associate的过去式和过去分词)，联盟，陪伴；n. 合伙人，伴侣，同志，联想物，附随物，会员集体；adj. （用于联合企业的名称）联合的，有关联的，联合的；

例句
Genetic abnormalities are more often associated with faults in paternal DNA than in maternal DNA.
相对于母本DNA,基因畸变往往更多地与父本DNA上的缺陷相关。

clavicular

adj. 锁骨的；

例句
Internal rotation is accompanied by scapular retraction and associated clavicular movements.
内旋转会伴有肩胛骨回缩及相关的锁骨运动.

movements

n. 整个活动，运动( movement的名词复数 )，动作，移动，调动；

例句
In the process of their careful watching and recording the celestial movements the Chinese provided valuable and interesting information for succeeding generations.
古代中国人在仔细观察、认真记录天体运动的过程里，为后代留下了宝贵而又有趣的资料。