users' systems 还是user's systems?还是users' system?这个复数该怎么加?用户的系统 （多个用户各自的系统）

users' systems 还是user's systems?还是users' system?这个复数该怎么加?用户的系统 （多个用户各自的系统） 英语：The users use Weibo w_____. 英语翻译Intranet and Internet based applications for use by internal users and Supplier users,一整句话是这样的， users nust enter a user name and password to use this computer 英语翻译The need for well-performing and user-friendly payment systems that would satisfy both sides emerges clearly.These systems should meet needs of users and vendors,and demonstrate a potential for acceptance on mass market.我被卡住了, 英语翻译Knowledge based systems make recommendations by knowledge reasoning and need not learn users’ preferences first.There are three kinds of knowledge in knowledge based recommender systems,namely user knowledge,product knowledge and functi 3、 The engine system use six different systems to develop the engine power ,they are 英语翻译most cities where citizens use public transport often are cities equipped with efficient rail systems. so many people who are trying to use the Internet to hurt other users.上句为什么不直接写成下面句子:So many people use the Internet to hurt other users. use internet还是use the internet use renthouse select {u.*},{h.*} from users as u,house as h 求解,hibernate 的, 谁能告诉我什么意思? 1.What are the general attributes or characteristics economists use in differentiating economic systems?How do economic systems differ within these characteristics?Explain carefully.2.How do economists evaluate the performance of economic systems?Dis use well-documented tricks:Write for online,not print.To draw users into the text and support scannability,use well-documented tricks: users是什么意思 USERS是什么意思 ? HDU 1039Problem DescriptionPassword security is a tricky thing.Users prefer simple passwords that are easy to remember (like buddy),but such passwords are often insecure.Some sites use random computer-generated passwords (like xvtpzyo),but users have HDU 1039Problem DescriptionPassword security is a tricky thing.Users prefer simple passwords that are easy to remember (like buddy),but such passwords are often insecure.Some sites use random computer-generated passwords (like xvtpzyo),but users have Earn points for doing the things you already do.Earn points when you trade, refer other users, and from trades your referred users perform.Trade points on the exchange - use points to enter weekly drawings for prizes.