放松大脑。 仔细听问题 请对方重复问题。 自己重复问题。 紧扣要点。

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
This may sound easier said than done when you need to provide a fast answer on the spot.  However, you can calm yourself by using relaxation techniques, such as:   Take deep breaths.  You'll slow your heart rate and move more oxygen to your brain. Repeat a positive and affirming message to yourself.  This could be as simple as "I've got this."  If you often face situations that require quick thinking, you might prepare in advance so a specific phrase comes to mind.  Tense your muscles for a few