每当你吃鱼，嫌弃鱼刺多的时候…… 生物学家也在困惑，鱼为什么要长刺？！ 我们知道，人类是早期鱼类经过5亿年演化来的，我们的骨骼系统也继承自鱼类骨骼系统。 但鱼刺却和我们没有半点关系。 人类的骨骼系统源于鱼类的头骨、中轴骨骼，以及附肢骨骼。

Logitech, Mercury Systems, Stratasys and TransAct have been highlighted in this Industry Outlook article. Despite a challenging macroeconomic environment, few companies in the Zacks Computer ...

“If you’re very close to the epicentre, you may not receive the warning in time. It’s just not physically possible to get the alert to people within that close epicentral region. You’ll get the alert ...

Delhi has experienced 446 earthquakes between 1993 and 2025 within 50km of Monday's epicentre. The National Centre for Seismology reported that the recent 4.0 magnitude quake felt more intense due ...