closed space
closed state中文是什么意思
closed supply chain中文是什么意思
closed surface中文是什么意思
closed syllable中文是什么意思
closed system中文是什么意思
英语词典收录了最新的汉英词典和英汉词典，总共有200多万个词条，词库仍在不断更新中。
