infrequently 

英汉解释

adv. 很少发生地；稀少地

反义词

r.   frequently，oft，often，oftentimes

参考例句

1. Suitable for the infrequently starting and stopping of 3-55KW three-phase asynchronous motor.
该产品适用于3-55KW三相异步电动机不频繁起动和停止用。
2. Regular operation: When the valve works infrequently, it should drive the machine regularly, checking abnormality or not.
定期运转：在阀门的动作很稀少时，可以定期驱动机器，检查有无异常。
3. Lower concentrations have been detected infrequently in tears, saliva, breast milk, colostrum, urine, and cervical and vaginal secretions.
人们偶尔也在眼泪、唾液、母乳、初乳、尿液以及宫颈和阴道分泌物中发现少量病毒。

英英解释

adv.
  1. not many times

网络释义

infrequently
很少发生地; 不经常的; 少有; 不经常地;
except for a small share of infrequently tracked and increasingly privatised collectives
除去一小部分不经常计入的私有化了的集体企业;