adv.不常出现地；
The road is not unfrequently flooded in spring. 这条路春天常被淹没。
When he grew old, pilgrims not unfrequently took scrip and staff, and set out to worship him. 但随着年事增高，拜访者开始络绎不绝，拄着拐棍，提着香袋前来朝拜。
"They not unfrequently wonder why, from being born blind, they should be held to be objects of commiseration" (Benjamin C. Brodie). “他们经常想问，为什么他们生来就是瞎子，就该成为被人可怜的对象” （本杰明·C·布罗得）。
She not unfrequently stopped at the Parsonage,had a few minutes' conversation with Charlotte,was scarcely ever prevailed on to get out. 小姐常在牧师的门前停下车来，跟夏绿蒂闲谈几分钟，可是主人从来不请她下车。
not unfrequently tore and spoiled her silk attire;and he was still 'her own darling. 他蛮横地与母亲作对，经常撕毁她的丝绸服装，而他却依然是“她的宝贝蛋”。
