make or become wider, larger, or more open 使膨胀;扩大 [no obj.]her eyes dilated with horror. 她出于恐惧瞪大了眼睛。 [with obj.]the woman dilated her nostrils. 那个女子张了张鼻孔。
[no obj. dilate on]speak or write at length on (a subject) 详述;铺叙
派生 dilatable adjective dilation noun 语源
late Middle English: from Old French dilater, from Latin dilatare 'spread out', from di- 'apart' + latus 'wide'