Idiom expressing prediction

Unexpected occurrence: the disaster is unpredictable. I wonder when there will be a disaster.

Good luck is uncertain: good luck: good luck, extended to misfortune, success or failure; Divination, extended to prediction. Whether this is a blessing or a curse, success or failure, is unpredictable.

The future is uncertain: how unpredictable it is.

Not confident: uncertain because you don't know the inside story or can't predict it.

Bering Bai Yan: Calculation and prediction are very effective.

Unpredictable: It means changeable and unpredictable.

I don't know: divination, expectation. You don't need divination to know. It means knowing without predicting.

Unexpected events: wind and clouds: metaphors of changing and turbulent situations. Unpredictable changes and turbulent situations.

Unfortunate disaster: measurement: conjecture, prediction. An incalculable disaster refers more to imprisonment or death.

Life and death are uncertain: b: guess, estimate. Whether it is life or death, it is unpredictable.

Unpredictable: Wind and clouds are unpredictable. Metaphor things or situations are as unpredictable as changeable situations.

Tiger accident: it is impossible to predict when and what changes will happen to the pattern on the tiger. Describing the whereabouts or temperament of an extraordinary person is unpredictable and elusive.

Words are like gods: predicting things is as effective as gods.

Just in case: guard against: guard against; Test: predict. Used to guard against unexpected things.