舒张的英文：
dilatation

These rhythmic waves of muscular relaxation and contraction are called peristalsis
这种肌肉舒张和收缩的有节律波动称为蠕动。

To conserve blood that will be needed by muscles, skin vessels constrict while vessels of the muscles dilate
为了保存肌肉所需要的血液，皮肤血管收缩，而肌肉血管舒张。

I step up the breathing rate--timing the contraction and relaxation of chest muscles
我增加呼吸率--调节胸部肌肉的收缩和舒张的速率。

The lungs dilate in breathing.
呼吸时肺部扩张。

The pupil of the eye dilates and contracts in response to light.
作为对光线作出的反应，眼睛的瞳孔会放大或缩小。

One of the small saclike dilations composing a compound gland.
腺泡组成复合腺体的小的泡囊

On this occasion he dilated at great length on the subject.
在这种情形下他又冗长地说明这个问题。

An instrument that dilates a body part,such as a cavity,canal,or orifice.
扩张器扩张身体部分的一种仪器，例如腔、管或是口