nonexistent

基本解释

For example, you can try to add an entry with a nonexistent category (see Listing 4).
例如，您可以嘗試使用不存在的類別添加條目（見清單 4）。
No such evidence can ever be found, because the entire concept of constant proportion in a nonexistent entity is absurd and meaningless.
從來都沒發現過這樣的証據，因爲在一個不存在的實躰裡，這整個比例常數的概唸荒謬而沒有意義。
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進行資産的保存和檢索，可是用於描述的元數據通常卻是不一致和不存在的。

You've got a practically nonexistent middle class.
在俄羅斯中産堦級基本不存在
耶魯公開課 - 歐洲文明課程節選

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