Gets the root activity of the workflow instance associated with the tracking channel.

获取与跟踪通道关联的工作流实例的根活动。

youdao

The first activity on the left is the root activity (0000), which is the default activity.

左侧的第一个活动是根活动(0000)，它是默认活动。

youdao

In seedling stage, the root activity increase at first and then descend with the Se concentration increasing.

苗期，根系活力随着硒浓度的变化，呈现出先增加后下降的趋势；

youdao

He said the government was working closely with businesses to "root out any illegal activity" and enforce regulations.

BBC: UK

Not surprisingly, as entrepreneurial activity has been on the uptick, women-led firms are taking root there as well.

FORBES: The Best Cities For Working Mothers, 2012