It's uncertain whether English will be the world language in the future, but we should still keep learning.
未来英语是否会成为世界语言还不确定，但是我们也应该努力学习。
Management is all about making difficult tradeoffs in conditions that are always uncertain and often fast-changing.
管理就是在不确定且经常快速变化的条件下做出艰难的权衡。
Although the origins are uncertain, experts think that this is largely due to the high level of volcanic activity in the area.
尽管起源还不确定，专家认为这主要是由该地区频繁的火山喷发所造成的。
Growers may feel their prospects are good for an upcoming harvest, but until that day arrives, the outcome will always be uncertain.
种植者可能会看好即将到来的收获季，但那天到来之前结果都是不确定的。
Until the recent discovery of fossilized sauropod nesting grounds, scientists were thus uncertain whether sauropods laid eggs or gave birth to live young.
因此，直到最近发现蜥脚类恐龙筑巢地的化石之前，科学家们还不能确定蜥脚类动物到底是产卵还是胎生。
For example, a company may be able to estimate accurately the aggregate number of shoes it will sell, but it may be uncertain about which specific types of shoes will sell more than other types.
例如，一个公司也许能够准确地估计它将销售的鞋子总数，但它可能不确定哪一种特定类型的鞋子将比其他类型的鞋子卖得更多。
The baby took its first uncertain steps.
宝宝迈出了最初的蹒跚的脚步。
She told him in no uncertain terms to go away.
她非常明确地叫他走开。
In a sports team each plays a clear role, and there are few occasions when members are confused or uncertain of their roles.
在运动队中，每个队员都有清晰的角色定位，队员们很少对自己的角色感到迷惑或不明确。
她前途未卜。
I told him what I thought of him in no uncertain terms.
我直言不讳地说出了我对他的看法。
In your letter, you told me what you thought of my behaviors in no uncertain terms.
在你的信中，你直截了当地告诉了我，你对我的行为的看法。
Years have rolled by, and who is this elegant lady of uncertain age alighting at London Station?
很多年过去了，在伦敦火车站下车的这位年纪不定的优雅女士是谁呢？
I can declare in no uncertain terms that not praising children can lead to their lack of confidence.
我可以毫不含糊地说，不赞扬孩子会导致他们缺乏自信。
Add a rapidly changing economy and an uncertain future to this 24/7 connectivity, and you've got a recipe for overwork, according to Phyllis Moen.
根据菲利斯·莫恩的说法，这种“一周7天、一天24小时”的网络连接，再加上快速变化的经济和变幻莫测的未来，你就很容易会过度劳累。
These are uncertain times for architects.
这是建筑师们的莫测年代。
Don't put your hope in wealth which is so uncertain.
不要把你的希望寄托在不确定的财富中。
Still, even uncertain data seems better than none at all.
不过即使是具有不确定性的数据看上去也聊胜于无。
My song heaves a sigh and trembles with uncertain desire.
我的歌叹息着，欲言又止，打不定主意。
The future of schools like this one, however, is uncertain.
然而现在，这些学校却前景难料。
In an uncertain economic environment, that won't be an easy task.
在一个不确定的经济环境下，要做到这点并非易事。
Seek out employers who stay steady and calm in uncertain times.
找出那些在不稳定时期仍保持稳重、镇定的雇主。
Live life for the moment, because everything else is uncertain.
活在当下，因为其他的一切都是不确定的。
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。
Rudeness is out, and civility is the new rule in an uncertain world.
粗鲁已经过时了，礼貌是这个瞬息万变的世界里的新规则。
Scientists are still uncertain as to why lightning occurs during some eruptions.
科学家尚不能确定火山喷发时闪电的形成原因。
People who ask confidently get more than those who are hesitant and uncertain.
自信地询问的人会比那些犹犹豫豫、没有把握的人得到更多。
People who ask confidently get more than those who are hesitant and uncertain.
自信地询问的人会比那些犹犹豫豫、没有把握的人得到更多。
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