non-existent

英 [ˌnɒn ɪɡˈzɪstənt]

美 [ˌnɑːn ɪɡˈzɪstənt]

adj.  不存在的; 不真实的

复数：non-existents　

Collins.1

牛津词典

adj.

• 不存在的；不真实的
  not existing; not real
  1. a non-existent problem
     不存在的问题
  2. ‘How's your social life?’ ‘Non-existent, I'm afraid.’
     “你的社交生活如何？”“我恐怕没有社交生活。”
  3. Hospital beds were scarce and medicines were practically non-existent .
     当时医院病床紧缺，药物根本所剩无几。

柯林斯词典

• ADJ 不存在的
  If you say that something isnon-existent, you mean that it does not exist when you feel that it should.
  1. Hygiene was non-existent: no running water, no bathroom...
     卫生根本谈不上：没有自来水、没有卫生间。
  2. You'll take everything you're offered yet your own generosity is virtually non-existent.
     你倒是来者不拒，照单全收，可你自己实际上却一毛不拔。

双语例句

• It is an error to extract a value using a non-existent key.
  试图析取从一个不存在的关键字中读取值会导致错误。
• Wildlife is virtually non-existent in this area.
  野生动物在这个地区几乎不存在。
• In areas where health systems are weak or virtually non-existent, basic data will not be collected.
  在卫生系统薄弱或事实上不存在的地区，是不会收集基本数据的。
• An attempt was made to end a non-existent transaction.
  试图终止一个不存在的事务。
• Reliable figures for work-related suicide are almost non-existent.
  究竟有多少起自杀与工作有关，目前几乎不存在可靠数据。
• This means that privileges can be granted to non-existent user and group accounts with the information being stored in the database.
  这意味着，可以把权限和数据库中存储的信息授予不存在的用户和组帐户。
• They're working off of an imagined use case, with an invisible and non-existent user.
  他们开发出的是想象的用例，以及看不到和不存在的用户。
• Reported when trying to erase, rename or open a non-existent file.
  当尝试的时候，报告抹掉，重新命名或者开启一个非存在的文件。
• Sanitary conditions in the camps are non-existent and cholera, typhoid and other epidemics could break out any day.
  军营里根本没有卫生条件，霍乱、伤寒和其他传染病随时可能爆发。
• This application has a dependency on a non-existent service. That dependency has been removed.
  此应用程序依赖于一个不存在的服务。此依存关系已被删除。