You can automatically play back a sequence of timelines by chaining them. You can also use this feature for automatically looping a timeline.
你可以把多条时间轴链接起来并播放。你也可以利用这个功能来自动地循环播放一条时间轴。
2
In order to reduce the number of messages sent back and forth, power users may user "command chaining" to send several commands that get called sequentially.
为了减少来回发送的消息数量，功能强大的用户还可以使用“命令链”发送几个按顺序呼叫的命令。
3
Some exercises need to be trained through a process called back-chaining.