dilate

动词

1. 1

   扩张、放大、变宽

   Her pupils dilated as she stepped into the dark hallway.

   她走进黑暗的走廊时，瞳孔随之扩张。

2. 2

   使扩张、使膨胀

   The doctor used drops to dilate the patient's pupils before the exam.

   医生在检查前用眼药水让病人的瞳孔放大。

3. 3

   详述、细谈正式

   He dilated on the topic for nearly an hour without notes.

   他不看稿就这个题目详述了将近一个小时。