Yet the West's economies have embarked on contractionary policies.

然而西方经济体却实施收缩银根的政策。

An official recession-two consecutive quarters of contraction-could be on the cards.

正式的经济衰退—连续两个季度的收缩—很有可能会发生。

Bob Goodman controls his bionic arm by contracting his biceps and triceps muscles.

鲍勃·古德曼控制他的仿生手臂收缩他的二头肌和三头肌肌肉。

Those forced to exercise their smiling muscles reacted more enthusiastically to funny cartoons than did those whose mouths were contracted in a frown, suggesting that expressions may influence emotions rather than just the other way around.

那些被迫锻炼微笑肌肉的人比那些嘴巴收缩成皱纹的人对有趣的动应更热烈，这表明表情可能影响情绪，而不是相。

This concentration gradient is extremely important for setting the resting membrane potential of excitable cell membranes, which is needed for normal contraction of smooth, cardiac, and skeletal muscle.

电化学梯度在可兴奋胞膜静息电位的形成中十分重，而平滑肌，心肌还有骨骼肌的收缩都需可兴奋胞膜的参与。

They found that the clam first contracts its shell.

他们发现蛏子首先会收缩自己的外壳。

The process requires pinpoint timing of contractions and digging.

而这一过程需收缩及挖掘动作的精确配合。

Then you have to fight inertia to contract your body, making yourself spin faster.

接下来你惯性，收缩你的身体，才能让自己转得更快。

Gradually, their contractions become weaker, ultimately impeding the pumping of blood to your heart.

逐渐地，肌肉的收缩变弱，最终阻碍血液泵入心脏。

Yes, so labor is the physiologic process of delivery of a baby from the uterus, through the cervix, through the vagina, and it requires regular uterine contractions, dilation of the cervix, and thinning of the cervix, or effacement.

是的，分娩是指通过子宫、宫颈和阴道将婴儿娩出的生理过程，这一过程需有规律的子宫收缩、宫颈扩张以及宫颈变薄，即宫颈消失。

Since they constantly expand and shrink, it would be hard to do that practically.

由于那些套装总会有被撑大或者收缩变小的问题，所以实际上很难参与正常拍摄。

One of his deeds was the theft of the Great Pyramid of Giza, which affected Gru's pride, and Vector contended with him for control of a shrink ray and eventually the moon.

他的罪行之一是偷窃了吉萨大金字塔，这让格鲁的自尊心受挫，维克多与他争夺收缩射线的控制权并最终夺到了月球。

You can get a little muscular contraction on your face.

你的脸上会有一点肌肉收缩的感觉。

A human heartbeat is regulated by electrical charges that signal muscles to contract and release.

人类的心跳是由电荷调节的，它向肌肉发出收缩和释放的信号。

It's not like we have some magic electromagnetic shrink ray, like professor Wayne Szalinski used in " Honey, I Shrunk the Kids" to shrink his children.

并不是说我们拥有某些有魔力的电磁收缩射线，就像韦恩·萨林斯基教授在 “亲爱的，我把孩子们缩小了”里面用来缩小他的孩子们的机器。

Well everyone, do you know something that stretches and shrinks?

所有人，你知道什么是伸展和收缩的吗？

As an October 2011 study in the New England Journal of Medicine says: " Caloric restriction results in acute compensatory changes, including profound reductions in energy expenditure and levels of leptin and cholecystokinin and increases in ghrelin and appetite."

正如 2011 年 10 月发表在《新英格兰医学杂志》上的一项研究所说：“热量限制会导致急性代偿性变化，包括能量消耗、瘦素和胆囊收缩素水平的显著降低，以及胃饥饿素和食欲的增加。”

We could use my molecular shrink ray!

我们可以用我的分子收缩射线！

So, in the 1780s, this Italian physicist, Luigi Galvani, experimented with applying electric shocks to the legs of dead frogs, and found that he could get their muscles to contract for a limited time after the frog had died.

因此，在18世纪80年代，这位意大利物理学家， Luigi Galvani ，对死青蛙的腿进行了电击实验，他发现在青蛙死后的一段时间里，他可以让它们的肌肉收缩。

And it allows the swim bladder to reverberate. Much like any sort of drum.

这是通过收缩鱼鳔周围的肌肉所发出的声音。“它让鱼鳔发出回响。非常像鼓声，像充气的腔室。”