english online self-learning
...在线自学；B/S；验证码；三层体系结构；安全 〖毕业设计(论文)咨询QQ：306826066〗 [gap=1859]Key words: Knowledge Base Management; English Online Self-learning; B/S; The Certification Code; Three-tier Architecture; Security ..
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english online self-learning
英语在线自学
以上为机器翻译结果，长、整句建议使用 人工翻译 。