In spite of infrequency, complications secondary to placement of these surgical drains occur.

尽管不常见，但因放置外科引流管导致的合并症仍会发生。

With their greater infrequency the sounds increased in strength and sharpness. They hurt his ear like the trust of a knife;

随着频次变少，声音变得越来越大，越来越尖锐，像刀子一样刺痛他的耳朵；

Doctors can get an inkling by questioning people about their age, diet, infrequency of exercise and smoking habits—but it is only an inkling, not a direct measurement.

医生可以通过询问病人的年龄、饮食、锻炼的频率以及吸烟的习惯得到初步印象——但这仅仅是初步印象，并不是直接测量。

Doctors can get inkling by questioning people about their age , diet , infrequency of exercise and smoking habits —but it is only inkling , not a direct measurement .

医生可以通过询问病人的年龄、饮食、锻炼的频率以及吸烟的习惯得到初步印象——但这仅仅是初步印象，并不是直接测量。

The key problem with this kind of approach, though, is that the infrequency of these meetings mean that product a might have to wait a long time to make a key decision about how to build that product.

但是，这种方法的关键问题，在于这种很少召开的会议意味着产品A可能需要等待相当长的时间，以作出决策决定怎样构建该产品。