Innit, it's the contracted form of, isn't it?

Innit 是形式，不是吗？

You can get a little muscular contraction on your face.

脸上会有一点肌肉感觉。

Especially not if the shrinkage is pretty much indiscernible.

尤其是几乎看不出尺寸情况下。

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

所有人，知道什么是伸展和吗？

Isometrics are exercises employing static muscle contractions.

静训练是一种使用静态肌肉运动。

It works by blocking the release of a neurotransmitter called acetylcholine, which controls muscle contractions.

乙酰胆碱释放。乙酰胆碱正是神经控制肌肉那道指令。

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

然而西经济体却实施银根政策。

They found that the clam first contracts its shell.

他们发现蛏子首先会自己外壳。

And unlike common earthworms, the Mongolian death worm has a thick body which pulsates as it moves, egh.

与普通蚯蚓不一样，蒙古死亡蠕虫有着会随着移动而有规律粗大身体。

That was the idea which occurred to me the instant I saw the drawn muscles of the face.

我一发现他那面部肌肉情形，就想到是中剧毒现象。

As it shrinks, its gravity gets stronger and stronger.

随着，引变得越来越强。

For his stomach had an odd shrinking, and his head felt light and swimming.

因为他胃有一种奇怪，他头感到很轻，在游动。

When this happens — and it will, eventually — it's called the sliding filament model of muscle contraction.

当这种情况发生时——最终会发生——我们称之为肌肉滑动纤维模型。

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

接下来要抵抗惯性，身体，才能让自己转得更快。

Low potassium levels leads to issues with muscle contractions, which could be smooth, skeletal, or cardiac muscles.

两种途径低钾水平都会导致肌肉问题，可累及平滑肌、骨骼肌或心肌。

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

鲍勃·古德曼控制他仿生手臂他二头肌和三头肌肌肉。

The contractions continue for a few weeks after the delivery.

这种子宫肌层将持续到产后数周。

Welcome to this English lesson on contractions.

欢迎来到这个关于英语课。

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变小问题，所以实际上很难参与正常拍摄。

Vigorous exercise before bed – especially exercises that crunch the abdomen – can sometimes trigger heartburn.

睡前剧烈运动，尤其是腹部运动有时会导致烧心。