In real life, you know you've got chemistry when you find someone whose smile makes your heart pound.

现实生活中，你要知道当某人的微笑搞得你心跳加速的时候，你就已经被他/她的“磁性”所吸引住了。

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So, we feel relief (and elation) when we're around someone whose respectful smile or curiosity makes us feel safe to relax, explore, and play.

所以，当我们周围的人给我们报以尊重的微笑，使我们在休闲、探索和娱乐时获得安全感时，我们感觉很放松（或意气风发）。

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