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Muscles stretch, slacken and relax during child-birth.是什么意思？

Muscles stretch, slacken and relax during child-birth.

生孩子的时候，肌肉会拉抻、放松，然后松弛下来。

相关词汇
muscles stretch slacken and relax during

muscles

n. 肌肉( muscle的名词复数 )，（操纵他人的）力量，权力，肌肉组织；
例句
She could see the muscles of his shoulders beneath his T-shirt...
她可以看到他T恤衫下的肩部肌肉。

stretch

v. 伸展，延伸，持续，包括；n. 伸展，弹性，一片，一段时间；adj. 可伸缩的，弹性的；
例句
Oil has come ashore on a ten mile stretch to the east of Plymouth...
绵延10英里的浮油已经到达了普利茅斯东岸。

slacken

vt.& vi. （使）放慢，（使）放松、松懈、松弛，（使）减弱；
例句
Inflationary pressures continued to slacken last month...
上个月，通货膨胀的压力继续减小。

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。

relax

vt.& vi. （使）轻松，（使）松弛，放宽，（使）放松；vt. 缓和，减轻，（使大便等）通畅；vi. 变得轻松，变得随和，变得和蔼，通便；
例句
I could not relax and still felt wide awake.
我没法放松下来，还是觉得睡意全无。

during

prep. 在…的时候，在…期间，当…之时，其间；
例句
...the accrual of funds used during construction.
建设过程中资金的累积
热门例句
He acknowledged publicly that he might have made a mistake.
他当众承认自己可能犯了个错误。
...the spiralling vortex airflow that slows the plane.
使飞机减速的螺旋形气流涡旋
You just go on ahead. I'll come by later...
你只管先往前走。我随后就来。
He who spares his rod hates his son, But he who loves him chastens him early.
24不忍用杖打儿子的,是恨恶他;疼爱儿子的, 趁早管教.
For further information, please contact 414 3925, extension 2253.
详情请致电414 3925,转分机2253。
He sat there while I made the case for his dismissal...
他坐在那儿，听我陈述解雇他的理由。
Baroness Thatcher's claims seem credible to many.
撒切尔女男爵的主张在很多人看来是可信的。
Nothing to be got without pains but poverty.
一份耕耘，一份收获。
This decree obliges unions to delay strikes.
该法令迫使工会推迟罢工。
The right to demand payment from the endorser of a commercial paper when the first party liable fails to pay.
追索权当有支付义务的第一方不能支付时，可以向商业票据的背书人要求支付的权力。
相关例句
This last consignment of hosiery is quite up to standard.
这批新到的针织品完全符合规格.
It sounds like a wonderful idea to me, does it really work?
听起来这个主意很不错，真的能行吗？
The staff aura makes you immune to the disorient effect.
法杖的光环可以免疫迷惑.
I remember going to the lecture in my first week and getting very steamed up.
我还记得第一周去听课时生了一肚子气。
Guess I let you get the best of me.
我想,是我让你利用了我.
Objective To optimize the extraction process of ligustilide in Radix Angelicae sinensis and Rhizoma chuanxiong.
目的研究当归、川芎中藁本内酯醇提的最佳工艺条件.
The president was clearly exasperated by the whole saga...
整个事件显然让总统很恼火。
Its name is Ben Alder , it is a wild , desert mountain full of hills and hollows.
它的名字是本·亚尔德, 是一座尽是些山岗和鸡谷的漠无人烟的荒山.
...a pint of lager...
一品脱拉格啤酒
Of the two choices, I prefer the latter.
在两种中选择, 我要后者。