unascertainable

基本解释

The date of origin of this name is unascertainable.
這個名稱起於何時，已經無從稽考了。
The cause of dinosaur extinction is still unascertainable today.
現在恐龍滅絕的原因仍無法確定。
It consists of speculations on matters as to which definite kownledge has, so far, been unascertainable.
但它思考的問題卻是神學式的,是不確切的知識,是至今爲止還沒有找到答案的。
Lastly, fuzzy monitoring index and random monitoring index of displacement are presented for the unascertainable boundary conditions and mechanics parameters.
針對邊界條件、力學蓡數等的不確定性,研究了模糊監控指標和隨機監控指標的應用。