closed operation
closed pair中文是什么意思
closed path中文是什么意思
closed pneumothorax中文是什么意思
closed pores中文是什么意思
closed position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。
