However, if you have two elements where there is no direct parent-child relationship and they do not lie on the same level in the tree structure, their event firing sequence is not fixed.

但是，如果您拥有两个没有上下级关系的元素，而且它们在树形结构中不是同一层次，那么它们的事件引发序列就是不同的。

youdao

Oozie workflow is a collection of actions (i.e. Hadoop Map/Reduce jobs, Pig jobs) arranged in a control dependency DAG (Direct Acyclic Graph), specifying a sequence of actions execution.

Oozie工作流是放置在控制依赖DAG（有向无环图 Direct Acyclic Graph）中的一组动作（例如，Hadoop的Map/Reduce作业、Pig作业等），其中指定了动作执行的顺序。

youdao

However, P8 does not provide direct access to database sequence number types, so you must use other mechanisms.

不过，P 8不提供对数据库序列号类型的直接访问，因此您必须使用其他机制。

youdao

Using Freescale's direct sequence flava of UWB, the 720p HD video ran flawlessly off the UWB attached disk.

ENGADGET: Live from CeBIT: Ultra-Wideband (UWB) is here...almost

Main.net uses a related technology called direct sequence spread spectrum, or DSSS, to send its signals down the power line.

FORBES: Technology

In order to sequence Haemophilus, Dr Venter used a more direct approach.

ECONOMIST: Genetic warfare