unpredictable
unexpected
we can never predict what situations we will meet with
No one can tell the future.没人能够预知未来。被动语态貌似不够地道，所以就不用了。
We can not predict what kind of situations we will meet.
We are unable to expect which situations oneself can bump into
1.you never know what's going to happen2.you can never predict the future
The future is unexpected. The future is unforeseen.
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Bulabula789
