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。

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。

Whether or not this can be arranged is still uncertain .

这事能不能办成还是个 未知数。

His present whereabouts is unknown . ; His whereabouts is uncertain .

他目前下落 不明。

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。

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。

His voice was uncertain : it sounded unusual .

他的声音 犹豫不决，听起来也 不自然。

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。

The outcome of the matter is still uncertain .

此事还 未见 分晓。

He was uncertain about his brother 's intentions

他 拿 不准他哥哥的意图是什么。

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。

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。

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。

The evidence of this is uncertain .

关于这一点还 没有 确切的证据。

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。

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。

Students all over the country are facing an uncertain future .

全国各地学生 前途 未卜。

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。

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。

The date of the ship 's arrival is uncertain .

船到的日期 未定。

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。

The economic climate remains uncertain .

经济形势依然 不 确定。

She told him in no uncertain terms to go away .

她 明白无 误地叫他离她远远的。

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。

It 's uncertain whether they will accept the plan

还 不 确定他们是否会接受这一方案。

Short lifetime means uncertain mass .

短寿命意味着质量 不 确定。

The result is very uncertain .

不知会成什么 气候。

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。

The chances of success are uncertain .

成 不成 没 准儿。

It 's still uncertain when we would leave for wuhan .

什么时候去武汉还 说不定。