uncertainty
n
(a) [U] state of being uncertain 无把握; 不确定; 变化不定; 犹豫
The uncertainty is unbearable! 事情定不下来难以忍受!
(b) [C esp pl 尤作复数]
thing which is uncertain 无把握、 不确定或变化不定的事物
the uncertainties of life on the dole, ie as an unemployed person 依靠救济金生活的不安定.
The Native Americans caught and trained them and were then able to use them to carry their goods when they travelled from one camping ground to another.
美洲土著人捕捉野马,加以驯服。
He was just able to lie down on the ground, but could not stand up.