这是一本罕见的书。
This complication is also infrequent.
此并发症也不多见。
This was an infrequent , but very possible case.
这是一种罕见，但很可能的情况。
Do you want something that is short and infrequent?
你希望参加短期并且不频繁的事情吗？
Direct fetal injury is an infrequent complication of blunt trauma.
胎儿直接损伤是钝器伤的罕见并发症。
However, due to infrequent exercise, my technology is not very good.
但是由于不常练习，所以技术不是很好。
In practice, however, losing a case due to burden of proof issues is not infrequent.
而在争端解决的实践中，由于忽视证明责任规则而败诉的案例也屡见不鲜。
"Demand will be constant and supply is likely to be lumpy and infrequent," Brunel said.
Brunel说，“对碳指标的需求将是持续增长的，然而供给会是不连续的。”
However, we have a problem with the infrequent movies that have more than one director.
然而，我们又遇到一个问题，个别电影会有多个导演。
The disease is infrequent, and this makes it impossible to determine its true incidence.
本病较为罕见，故无法确定其发病率。
Rubella is an important childhood disease that was historically widespread but is now very infrequent .
风疹是儿童期疾病中重要一员，在既往很流行，但现在发作很少。
Rubella is an important childhood disease that was historically widespread but is now very infrequent .
风疹是儿童期疾病中重要一员，在既往很流行，但现在发作很少。
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