"perceptible only as unaccountable influences that hinder progress"
"an unexplainable fear"
例句
用作形容詞 (adj.)
On top of this, you're performing an absolutely unexplainable miracle that makes the whole experience completely unforgettable. 再此最上層,你制定使產品成就全部地更讓人不同尋常的是一個堅決不可能情況說明的奇蹤。