uncertain

adj.不确定的；不稳定的；不明确的；无常的

adj.

1. 无把握；犹豫；拿不准
   feeling doubt about sth; not sure
   1. They're both uncertain about what to do.
      他们两人都拿不定主意该怎么办。
   2. I'm still uncertain of my feelings for him.
      我仍不能肯定我对他的感情。
2. 多变的；难预料的
   likely to change, especially in a negative or unpleasant way
   1. Our future looks uncertain.
      我们似乎前途渺茫。
   2. a man of uncertain temper
      脾气令人捉摸不透的男人
3. 不确定的；未决定的
   not definite or decided
   1. It is uncertain what his role in the company will be.
      他在公司担当什么职务尚未决定。
4. 信心不足的；迟疑的
   not confident
   1. The baby took its first uncertain steps.
      宝宝迈出了最初的蹒跚的脚步。

1. The girl was uncertain what to do, or what tone of voice to adopt.
   女孩不知道该做什么，也不知道该用什么口气说。
2. The economic climate remains uncertain.
   经济形势依然不确定。
3. Whether the project will be a commercial success is still uncertain.
   这个项目是否赚钱还是个未知数。
4. Armstrong is uncertain where his long-term future lies
   阿姆斯特朗拿不准自己的人生远景在何方。
5. The sandbank was uncertain, like quicksand under his feet.
   那个沙坝并不稳固，他脚下如同踩着流沙一般。
6. For a minute he looked uncertain, and then recovered his composure
   有一小会儿他看上去有些迟疑不定，之后又恢复了镇定。
7. The future for manned space flight is looking increasingly uncertain.
   载人宇宙飞行的前景看上去充满了越来越多的变数。
8. He was uncertain about his brother's intentions
   他拿不准他哥哥的意图是什么。
9. They were uncertain of the total value of the transaction
   他们还不确定这笔交易的总价值是多少。
10. He stopped, uncertain how to put the question tactfully
    他停顿下来，犹豫着该如何巧妙地提出那个问题。
11. With some hesitation and an uncertain smile, she held out her hand.
    她犹豫了一下，带着迟疑的微笑把手伸了出去。
12. How far the republics can give practical help, however, is uncertain
    然而，这些共和国究竟能够提供多少切实可行的帮助还未可知。
13. It's uncertain whether they will accept the plan
    还不确定他们是否会接受这一方案。
14. Students all over the country are facing an uncertain future.
    全国各地学生前途未卜。
15. She told him in no uncertain terms to go away.
    她明白无误地叫他离她远远的。
16. His present whereabouts is unknown.; His whereabouts is uncertain.
    他目前下落不明。
17. The chances of success are uncertain.
    成不成没准儿。
18. The outcome of the matter is still uncertain.
    此事还未见分晓。
19. The date of the ship's arrival is uncertain.
    船到的日期未定。
20. It's still uncertain whether the College Spring Sports will be held this year.
    学院今年的春运会是否开还是个未知数。
21. The future is so uncertain that one man's guess is as good as another's.
    未来的事情很难臆测，大家都心中无数。
22. The girl came into the suite with uncertain steps, peering from Cleveland to madeline.
    这个姑娘用迟疑的步子走进房间，用眼睛偷偷地来回瞟着克里费兰和梅德琳。
23. Whether or not this can be arranged is still uncertain.
    这事能不能办成还是个未知数。
24. The evidence of this is uncertain.
    关于这一点还没有确切的证据。
25. His voice was uncertain: it sounded unusual.
    他的声音犹豫不决，听起来也不自然。
26. The result is very uncertain.
    不知会成什么气候。
27. It's still uncertain when we would leave for wuhan.
    什么时候去武汉还说不定。
28. Short lifetime means uncertain mass.
    短寿命意味着质量不确定。
29. The refugees huddled up in one part of the house, frightened and uncertain.
    难民们在房中的一处缩作一团，惊疑不定。
30. He was a little uncomfortable with him, a little uncertain.
    反正跟他在一起他总有点不自在，有点不踏实。