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<script src="https://lf3-cdn-tos.bytecdntp.com/cdn/expire-1-M/mermaid/8.14.0/mermaid.min.js" type="application/javascript"></script> <script>mermaid.initialize({startOnLoad:true})</script> <pre class="mermaid"> graph LR A["天体"]--"相互吸引、相互绕转"-->B["天体系统"] </pre>