（二）乏燃料，是指在反应堆堆芯内受过辐照并从堆芯永久卸出的核燃料。
You can include multimodal data like images. There’s something strange about including images when going back to Roman times or 1700 because while they had texts, they didn’t have digital images. However, this is acceptable for some purposes. You’d want to avoid leaking information that could only be known in the present. You could include things people at the time could see and experience themselves. For example, there may be no anatomically accurate painting in Roman times of a bee or an egg cracking, but you can include such images because people could see such things, even if they weren’t part of their recorded media. You could also have pictures of buildings and artifacts that we still have from the past.
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"Spaceflight is an incredible privilege," he said, "and sometimes it reminds us just how human we are."。业内人士推荐爱思助手下载最新版本作为进阶阅读
The primary use cases I’ve seen implemented or promoted so far include: