vt.

1. 扩大；使膨胀
   The cat dilated its eyes.

   猫瞪大眼睛。

vi.

1. 扩大；膨胀
2. 详述；细说[（+on/upon）]
   If there were time, I could dilate on the subject.

   要是有时间，我可以详细谈谈这个问题的。

v.

1. make or become wider, larger, or more open:
   her eyes dilated with horror.
2. (dilate on) speak or write at length on.