"我必须提醒自己呼吸，几乎是提醒我的心脏跳动。"

Simplified Meaning:

When someone says they have to remind themselves to breathe to remind their heart to beat, they are talking about feeling a lot of stress or anxiety. They are so overwhelmed that they have to consciously remember to do the basic things their body normally does automatically, like breathing and keeping their heart beating. Think about a time when you were really scared or nervous, maybe before a big test or presentation. Your body might have felt tense, and you might have forgotten to take deep breaths, making you feel even worse. In stressful situations, focusing on breathing can help calm the body and mind. Taking deep breaths can slow down a racing heart and help you feel more in control. For example, athletes often take deep breaths before an important game to calm their nerves, which helps them perform better. So, if you ever feel very anxious, remember to take some deep breaths to help your body relax and your mind feel more at ease. This can help you manage stress and improve your overall well-being.