While performance is a bit lower than using " traditional " billboards or sprites because of the frequent texture updates , impostors are updated to match your camera position , so they do look like real 3d objects 当在使用“传统”公告板或精灵的时候，因为引擎需要频繁的对纹理进行更新，性能相比之下一定受到影响，而视点替用特效的更新仅仅与你的照相机位置发生联系，因此它们更为象实时3d对象。
" confidantes only " address is kept protected . in my informal survey of discussions of spam on web - boards , mailing lists , the usenet , and so on , i ve found that a category of e - mail users gains sufficient protection from these basic precautions 我做过一次非正式的调查，在web公告板（ web - board ） 、邮件列表、 usenet等上讨论了垃圾邮件问题，我发现，有了这些基本的预防性措施，就足以保护这类电子邮件用户。
There ' s also a notice board , for public announcements such as the date of the next hogsmeade [ / color ] weekend , but also for notices from individual students seeking to buy or sell secondhand books , or trade chocolate frog cards , or similar , as in any school 公共休息室里还有一个公告板，用来公布一些通知，比如去霍格莫多[ / color ]过周末的具体日期等等；还像很多普通学校那样为学生们私下买卖二手书，交换巧克力蛙卡片等活动提供条件。
All of these materials can be used as a corpus useful for our further researches . 3 ) through the use of chatroom , bbs , and e - mails , the cooperation and communication among learners are realized , thus facilitating their mutual study 这有助于监控学习者的表现，提供及时的反馈，收集的资料也可以作为语料库，供以后的研究使用； 3 、通过利用班级聊天室、电于公告板、电子邮件等手段，可以实现学生与学生之问的协作和沟通，甚至是互相学习。
