"不管我多么努力想做一个普通人，我还是忍不住时不时插一句笑话。"

Simplified Meaning:

Sometimes, people try to fit in and act like everyone else, but their true personality still shows through. For example, imagine someone who loves to make others laugh even when they're trying to be serious and focused, they might still find themselves cracking a joke now and then. This happens because humor is a part of who they are, and it's hard to hide that. It's like being at a big family dinner where you know the atmosphere should be relaxed and formal, but you can't stop yourself from sharing a funny story that lightens the mood. This advice tells us it's important to embrace our natural selves, even if it doesn't always fit in perfectly with how we think we should act. Trying to hide your true nature can be exhausting, and letting it out in small, harmless ways can bring joy to you and those around you. People might appreciate the uniqueness and warmth you bring to a situation.