imponderable

劍橋詞典

something that cannot be guessed or calculated because it is completely unknown
（效果或結(jié)果）無法預(yù)測（或估量）的
There are too many imponderables to make an accurate forecast . 無法估量的事情太多，因而難以作出準(zhǔn)確的預(yù)測。 返回 imponderable