nonexistent

基本解释

For example, you can try to add an entry with a nonexistent category (see Listing 4).
例如，您可以尝试使用不存在的类别添加条目（见清单 4）。
No such evidence can ever be found, because the entire concept of constant proportion in a nonexistent entity is absurd and meaningless.
从来都没发现过这样的证据，因为在一个不存在的实体里，这整个比例常数的概念荒谬而没有意义。
Even when companies provide a consistent place to store and search for these assets, the metadata that describes them is typically either inconsistent or nonexistent.
即便公司提供了一致的地方进行资产的保存和检索，可是用于描述的元数据通常却是不一致和不存在的。

You've got a practically nonexistent middle class.
在俄罗斯中产阶级基本不存在
耶鲁公开课 - 欧洲文明课程节选

The likelihood of a revived Red Army marching on Berlin or Paris is below nonexistent.
FORBES: NATO: An Alliance That Divides Rather Than Unites
The organ is implanted, blood vessels regenerate and the scaffolding degrades away until it is nonexistent.
FORBES: Plastic Man
Hostile takeover attempts are extremely rare in Japan and shareholder activism is practically nonexistent.
FORBES: Japanese Business Culture and Why Good Governance Matters