unpredictable

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In absence of comprehensive information on how the software works, the user will have an impression that the its behavior is unpredictable.
如果沒有麪麪俱到的信息來(lái)描述軟件的工作方式，那麼用戶就會(huì)覺得它的行爲(wèi)是不可預(yù)知的。
If you have duplicate ID attributes, then results are unpredictable but generally not what you want, and the problem can be maddening to track down.
如果您有重複的 ID 屬性，那麼結(jié)果是不可預(yù)知的，但是，通常這不是您希望的結(jié)果，竝且問題非常難以確定。
Otherwise, you can easily end up in a situation where the classes on both sides of the call implicitly assume that they own that array, with unpredictable results.
另外，您可以容易地結(jié)束這樣一種情形，即調(diào)用的兩邊的類都隱式地假設(shè)它們擁有數(shù)組，衹是這樣會(huì)有不可預(yù)知的結(jié)果出現(xiàn)。

Volatile markets can react suddenly in wild and unpredictable ways.
The first is, that while God's promise is sure, the manner and the timing of its fulfillment is quite unpredictable.
首先是，上帝的承諾是確定無(wú)疑的，但實(shí)現(xiàn)的方法和時(shí)機(jī)卻都是不可知的。
耶魯公開課 - 舊約導(dǎo)論課程節(jié)選
Yeah, driving in LA, it's really unpredictable and can be dangerous.
是的，在洛杉磯開車，真的沒法預(yù)測(cè)，可能很危險(xiǎn)。
利用大衆(zhòng)交通工具吧 - SpeakingMax英語(yǔ)口語(yǔ)達(dá)人

Based on its own perceptions, an employee culture rarely does anything illogical or unpredictable.
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likely to change suddenly and without reason and therefore not able to be predicted (= expected before it happens) or depended on

If you describe someone or something as unpredictable, you mean that you cannot tell what they are going to do or how they are going to behave.
unpredictability