<p style="font-size: 12px;color:#aaa;">版权引用：<a href="https://pikwizard.com/photo/nasa's-hubble-captures-the-beating-heart-of-the-crab-nebula/19d7319b15a99699078346a5279e7966"><span style="font-size: 12px;color:black;">“NASA's Hubble Captures the Beating Heart of the Crab Nebula”</span> </a>由 <a href=""><span style="font-size: 12px;color:black;">nasa</span></a> 授权许可 <span><a href="https://pikwizard.com/cc0-license" target="_blank" style="font-size: 12px;color:black;">CC0 1.0 Universal Public Domain Dedication<img src="" style="display: inline-block;height: 16px;width: auto;"></a></span></p>