"unanticipated and disconcerting lines of development" "unforeseen circumstances" "a virtue unlooked-for in people so full of energy" "like a bolt out of the blue"
例句
用作形容词(adj.)
There were many unforeseen problems.有许多无法预料的问题。
Something completely unforeseen has arisen.一件根本预料不到的事情突然发生了。
You must make a liberal allowance for unforeseen circumstances.你必须充分考虑到预料不到的情况。