此项训练包括伸展和收缩腿部肌肉。
The exercise consists of stretching and contracting the leg muscles.
子宫开始每隔五分钟收缩一次。
在这项运动中，肌肉是在延伸而不是在收缩。
In this exercise, the muscles are elongating rather than contracting.
睫状肌一收缩，就拉动这些组织。
当温度降下来时它就收缩。
它可以收缩成一个小圆石的形状，并完全静止地坐在海底。
It can contract into the shape of a little round stone, and sit perfectly still on the seafloor.
面部肌肉的收缩既能影响人的内心情绪，又能将它反映出来。
The contraction of facial muscles both influences the internal emotional state and reflects it.
人造肌肉能在收缩过程中产生电力。这种电力未来甚至能为手机充电。
Artificial muscles can generate electricity during constriction. The electricity may even charge up your mobile phone.
物理学家费边推断，当星系间的气体冷却时，较冷的气体向星系中心收缩。
The physicist Fabian reasoned that as intergalactic gas cools, the cooler gas shrinks inward toward the center of the galaxy.
几个世纪过去了，岩石冷却、硬化，随后收缩、开裂，变成了长长的石柱。
As the centuries passed, the rock cooled and hardened, shrinking and cracking into long columns.
睡觉期间，胸腔所做的呼吸活动会减少，这使得横膈膜的收缩变得更加重要。
Movements of the rib cage for breathing are reduced during sleep, making the contractions of the diaphragm more important.
他们可以追踪大陆冰川的生长和收缩，即使是在温度变化不大的海洋区域——比如，赤道附近。
They could trace the growth and shrinkage of continental glaciers, even in parts of the ocean where there may have been no great change in temperature—around the equator, for example.
与橡木相比，其他木材的膨胀和收缩速度不同，所以用这些木材做的橡木船的修理会出现裂缝或漏水。
Other woods expand and contract at different rates than oak, so repairs to oak ships done with those woods split or leak.
随着细胞的死亡，有些人大脑前部和侧部的收缩，在三十多岁时就能观察到，但是也有些人直到六七十岁依然不明显。
Contraction of front and side parts as cells die off was observed in some subjects in their thirties, but it was still not evident in some sixty and seventy-year-olds.
天文学家的理论是，当一个巨大的物体在其自身的引力作用下灾难性地收缩，只留下一个强大的引力场，且没有任何东西能逃脱时，黑洞就形成了。
Astronomers theorize that a black hole forms when a massive object shrinks catastrophically under its own gravity, leaving only a gravitational field so strong that nothing escapes it.
严重偏头痛可以用一种收缩血管的药物来治疗。
Severe migraines can be treated with a drug that constricts the blood vessels.
为了达到最好的效果，把注意力都集中在收缩的盆底肌上。
For best results, focus on tightening only your pelvic floor muscles.
太空地质学家猜测这些陡坡是在几十亿年前当行星表面冷却收缩时开始形成的。
Astrogeologists suspect that these scarps having formed billions of years ago as the planet's surface cooled and shrank.
面部肌肉因紧张而收缩会加强这种刺激，如人们感到恐惧时所表现出的肌肉收缩。
Intense contraction of facial muscles, such as those used in signifying fear, heightens arousal.
在实验室里，当海豹潜入到水面以下并停止呼吸时，它的心脏跳动得更慢，需要的氧气更少，动脉也会收缩。
In the laboratory, when the seal dives below the surface of the water and stops breathing, its heart beats more slowly, requiring less oxygen, and its arteries become constricted.
单纯收缩期高血压病人潜存高风险。
Patients of semplice systolic hypertension have potentially high risk.
目的是探讨彩色多普勒静脉收缩术在评估二尖瓣反流分级中的作用。
The objective is to explore the roles of color Doppler vena contracta in the evaluation of mitral regurgitation grading.
在对母体骨盆和胎儿先露都进行评估后，低张性子宫收缩应加以强化。
Uterine hypocontractility should be augmented after both the maternal pelvis and fetal presentation have been assessed.
A组采用改良的右心导管测定法测定肺动脉平均压、右心室收缩压、右心室舒张压。
The MPAP, RVSP, RVDP were determined by modified rig ht heart catheterization in group A.
目的是探讨八肽胆囊收缩素（CCK-8）对经钥孔戚血蓝蛋白（KLH）免疫小鼠T淋巴细胞亚群的影响。
The aim is to study the effects of cholecystokinin octapeptide (CCK-8) on T-lymphocyte subsets in keyhole limpet haemocyanin (KLH)-immunized mice.
睫状肌一收缩，就拉动这些组织。
全球企业正准备迎来更多收缩。
它水分少，既不会收缩也不会膨胀。
It absorbs very little moisture and will not shrink or swell.
正常衰老的同时，海马体也会收缩。
最长：43秒，连续收缩25次！
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