infrequent
adj. 稀少的; 罕见的
If something is infrequent, it does not happen often.
...John's infrequent visits to London.
约翰仅有的几次伦敦之行
1. not frequent; not occurring regularly or at short intervals;
Do you something that is short and infrequent?
你希望项目是短期并且不频密的 吗 ?
If written work is incomplete or attendance is infrequent, you will not pass the course.
如果没有完成书面报告或者出席率不高, 你将无法及格.
Polycystic ovary syndrome: Endocrine disorder in women, characterized by high androgen levels and infrequent or absent ovulation.
多囊卵巢症候群: 妇女内分泌疾病, 因雄激素过高而阻碍了排卵.
Barriers between nations are reared by slow and infrequent communication.
国与国之间的隔阂是由沟通缓慢而又太少形成的.
Disturbances are relatively infrequent in British prisons.
相对来说,英国监狱不常发生骚乱.