adj.不频发的；不常见的
Muggings are relatively infrequent in this area. 在这个地区行凶抢劫事件相对少见。
This year our country produced the infrequent pluvial calamity on the history. 今年我国发生了历史上罕见的洪水灾害。
Primary abscess of the omentum is an infrequent disease entity. 原发性大网膜脓疡是一种罕见的疾病。
adv.罕见地；稀少的
