be of rare occurrence中文什么意思

很少发生

• rare:    adj. 〔美国〕(肉)烹调得嫩的， ...
• occurrence:    n. 1.(事件的)发生，出现，有； ...
• a rare occurrence:    罕见的事件

例句与用法

1. Profession , were of rare occurrence in the colony . they seldom , it
   当时在殖民地，精通内外科医术的人尚不多见。
2. Skilful men , of the medical and chirurgical profession , were of rare occurrence in the colony
   当时在殖民地，精通内外科医术的人尚不多见。