"for example?"

Connor is very interested now, he wants to know more.

The reason why he wants to know more is not because he is so eager to learn, but simply stimulated by an amazing income.

People will have different degrees of response when they are stimulated, some stimuli are positive, and some stimuli are negative.

But no matter what, their blood pressure will rise, their heart rate will increase, and they will even secrete adrenaline to make the body

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