我的幻灯片搞混了，它们显示顺序错乱了。

I got my slides mixed up and they appeared out of ___sequence.

这是他连续第四个夏天选择这家酒店。

It was the fourth summer in ___sequence that he had chosen this hotel.

事件必须遵循特定的顺序才能说得通。

The events must follow a specific ___sequence to make sense.