dilate

• 动词，表示使某物扩大、扩张或张开，常用于医学或科学语境，如血管扩张、瞳孔扩大。

A verb used to indicate the act of making or becoming wider, larger, or more open, often used in medical or scientific contexts.

1. Widen or expandB2formalmedical

   To become wider, larger, or more open, especially in reference to a body part or opening.

   扩张

   • The doctor used drops to dilate the patient's pupils for the eye exam.
   • During labor, the cervix dilates to allow the baby to pass through.
   • Blood vessels dilate to increase blood flow during exercise.

   同义词broadendistendenlargeexpandopenwiden

   反义词constrictcontractnarrowshrink

2. Speak or write at lengthC1formal

   To speak or write in great detail about a subject.

   详述

   • The professor dilated upon the historical significance of the event.
   • He dilated at length about his travels in Asia.
   • The report dilates on the economic implications of the policy.

   同义词descantdiscourseelaborateenlargeexpatiateexpound

   反义词abbreviateabridgebriefcondense