This was an infrequent , but very possible case.

这是一种罕见，但很可能的情况。

youdao

So earthquakes in this part of China are infrequent but no unexpected.

因此，地震在这方面是中国的一部分，是屡见不鲜，但没有意料中事。

youdao

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。

youdao

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。

youdao