This is an optional fixed bar available to an application at all times, whenever core commands are needed.

工具栏是在用户需要使用应用程序时，可以控制该程序核心命令的一个可选的固定工具条。

youdao

Part III introduced stage bar control system's achieved; this is the core of the system.

第三部分介绍了舞台吊杆控制系统的实现，这是系统的核心部分。

youdao

It would also be nice if Rich doesn't reserve the vertical bar for anything so we can keep it as part of our core DSL for conditional probability notation.

如果Rich不保留竖线也挺好，这样我们可以将它作为我们核心dsl的一部分，用来作为条件概率记号。

youdao

It said that during 2012, although sales in its core football business increased by 3%, bar sales fell by 7%.

BBC: Goals Soccer Centres scores 3% rise in profits