You should focus onlearning about important but infrequently used features of VCS of your choice.

你应该集中精力学习你所选择的VCS特征，重要但不常用的。

youdao

But we really can't afford to build every requested extension directly into the processor; we'd wind up with a huge library of infrequently-used features.

但我们确实不能负担将每个请求的扩展都直接构建到处理器中的任务；那将会形成一个有许多不常用功能的巨型库。

youdao

Or going with an infrequently-used color combination that's rare in the design world - but you saw plenty of during coastal sunsets.

或者会用设计界很少见的颜色组合，但你会在海岸边的落日中看到许多。

youdao

The death penalty has been used in the past for drug traffickers, but in recent years it has been applied infrequently.

BBC: Paul Beales (left) and Rachel Dougall, two of the suspects.