cephradine头: 5点就得动身 have to start before ...孢: spore环: ring; hoop已: stop; cease; end烯: alkene; olefince下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:头孢环已烯，即可在微信中查询翻译
