We do not memorize our automatic habitual actions.

我们不会记住自己的自动习惯动作。

And a yawn can be described as a behaviour-a particular kind of automatic action in response to a particular situation.

打哈欠可以被描述为一种行为——应对某种特定情景而产生的特定的自发动作。

Override in this context means to stop an automatic action by taking control yourself. Airline pilots do that, don't they?

Override在这里是指停止自动程序，自己操控。航空公司飞行员不就是这么做吗？

And a yawn can be described as a behaviour – a particular kind of automatic action in response to a particular situation.

打哈欠可以被描述为一种行为——一种特殊情况下的自动反应。