n.膨胀，扩张，扩大

The doctor performed dilation to widen the narrowed coronary artery.
医生进行了扩张手术以拓宽狭窄的冠状动脉。
She had to undergo cervical dilation before delivering her baby via cesarean section.
在进行剖腹产之前，她需要接受宫颈扩张术。
Dilation of pupils is a common response to low light conditions.
孔径扩大是光线较暗时的常见反应。
Time dilation occurs as an object approaches the speed of light.
当物体接近光速时会发生时间膨胀现象。
The medication caused significant dilation of his blood vessels, improving blood flow.
这种药物使他的血管显著扩张，从而改善了血液流动。
The dilation and contraction of lung alveoli facilitate the process of respiration.
肺泡的扩张与收缩有助于呼吸过程。
He experienced spatial dilation during his journey through space at high speeds.
在高速穿越太空过程中，他体验到了空间膨胀现象。
The cardiologist recommended balloon dilation to treat the patient's valvular heart disease.
心脏病专家建议采用球囊扩张术治疗该患者的心瓣膜疾病。
The nurse checked for any signs of uterine dilation during the woman's labor.
护士在女子分娩过程中检查子宫是否有任何扩张迹象。
After taking the decongestant, he noticed immediate dilation of his nasal passages.
服用解充血药后，他立即注意到鼻腔通道扩张了。