next_a = soup.select_one("a.next")
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As soon as we try to install a package with dnf, we’ll get an error. We need to use rpm-ostree to manage packages.
最令航天业担忧的是钇供应紧张。钇是高温防护涂层中的关键成分，可防止发动机和涡轮在高温下“熔化”，一旦无法定期施涂相关涂层，发动机便无法正常服役。，详情可参考91视频