Note: this is less practical and infrequently used.

注意：这是实践较少的，很少使用。

youdao

Metastatic lesions were common on trunk and neck, and infrequently on lower extremities.

躯干和颈部是常见的转移部位，下肢转移较少。

youdao

Even though relatively costly, the engine is highly efficient and infrequently needs servicing.

尽管相对贵一些，但是这个发动机效率更高，而且不需要经常维修。 【参考答案】。

youdao

So, don't start here. And, it happens infrequently, but I've got to tell you, a few years back on the final exam, a couple of people were involved in passing information back and forth.

不要开始这样做，这也不常发生，我要告诉你们,几年前的期末考试里，有几个人，他们,给前后传递答案。

麻省理工公开课 - 固态化学导论课程节选

While the federal government routinely obtains one 30-day extension of filing deadlines in its Supreme Court cases and not infrequently obtains a second, the 98-day extension in this case is very unusual, even by federal government standards.

FORBES: DOJ's Advantage-Seeking Delay Maneuvers at Supreme Court: Time for Transparency

As a result, Bigwala is performed infrequently and faces a real threat to its survival.

UNESCO: MEDIA SERVICES

People move in or out very infrequently and they have no desire to change.

BBC: World Cup vote - Anson floats Fifa reform proposal