You must have a key at the time where you see the orange line. Try these:
1) ctrl+H to Show All Bones/Slots. If a bone or slot is hidden, it won't show the row in the dopesheet.
2) Check Show all skin attachments in the tree properties, which will also show deform timelines for all attachments in all skins.
你必须在你看到橙线的时候有一把钥匙。试试这些。
1) ctrl+H显示所有骨骼/槽。如果一个骨头或槽被隐藏了，它就不会在dopesheet中显示这一行。
2）在树的属性中勾选显示所有皮肤的附件，这也会显示所有皮肤中所有附件的变形时间线。
