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BNC: 3532 COCA: 4291
uncertain
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adjective /ʌnˈsɜː(r)t(ə)n/
  1. 1
    not clearly known or understood 不确知的；不确定的

    The origin of the word is uncertain. 这个词的词源尚不清楚。

    it is uncertain whether/why/how etc :

    It is uncertain how they entered the property. 不清楚他们是怎样进入那处私人领地的。

    remain uncertain :

    Despite recent research, the precise mechanism of the virus remains uncertain. 尽管最近已作了研究，但该病毒的精确结构仍不得而知。

     Synonyms and related words
    Not known or difficult to know: secret, private, personal...
    1. a.
      likely to change and become worse 易变的；可能变坏的

      The economic outlook was beginning to look uncertain. 经济前景开始变得不甚明朗。

      uncertain future :

      The industry as a whole faces a very uncertain future. 整个行业面临着变幻莫测的未来。

       Synonyms and related words
      Able to be changed and lasting only a short time: variable, brief, short-term...
  2. 2
    not feeling sure about what to do, whether something is true etc 心中无数的；不能断定的
    uncertain about/of :

    I left the meeting feeling anxious, and uncertain about what to do next. 我满心焦虑地离开了会场，不知道下一步该怎么办。

    uncertain what/why/how etc :

    Greg was uncertain how to respond to this odd request. 格雷格拿不准怎样答复这个古怪的请求。

     Synonyms and related words
    Uncertain about something: uncertain, unsure, doubtful...
    1. a.
      not confident 没有信心的

      Sara seemed more self-assured: no longer young and uncertain, but a confident professional woman. 萨拉看起来更加自信了：她不再显得年轻又缺乏信心，而是一个充满自信的职业女性。

       Synonyms and related words
      Not confident or shy and easily embarrassed: shy, uncertain, retiring...

derived word

uncertainly

adverb
 Synonyms and related words
Uncertain about something: uncertain, unsure, doubtful...
 Synonyms and related words
Not confident or shy and easily embarrassed: shy, uncertain, retiring...
BNC: 3532 COCA: 4291
uncertain

adjective¹

 1not confident沒有信心VERBS | ADVERB | PREPOSITION VERBS➤be, feel, look, seem, sound沒有把握；感覺沒有把握；看上去缺乏信心；顯得缺乏信心；聽上去沒把握▸➤become變得不肯定➤leave sb使某人沒了信心◇His research into the incident has left him uncertain as to exactly where responsibility lay.對該事件作了調查研究後，他無法確定究竟是誰的責任。➤make sb令某人沒有把握ADVERB➤deeply, very非常缺乏信心◇I feel deeply uncertain about the future.對於未來我深感信心不足。➤rather, somewhat相當沒把握；有些拿不準▸➤a little, slightly, etc.有點兒／略有些吃不準PREPOSITION➤about, as to對⋯缺乏信心； 對⋯沒把握◇He seemed strangely uncertain as to how to continue.很奇怪，他好像不知道該如何繼續下去。➤of對⋯不確定◇We were rather uncertain of the direction it came from.我們都不太確定它是從哪個方向過來的。
uncertain

adjective²

 2not known exactly不確知VERBS | ADVERB VERBS➤be, look不確切知道；看上去不確定▸➤become變得不確定▸➤remain, seem依舊未確知；看上去不確定➤make sth使⋯不確定◇immigration policies that made employment status uncertain造成就業狀況不確定的移民政策ADVERB➤extremely, fairly, very, etc.極其／相當／非常不確定▸➤highly非常不確定◇Cost estimates are highly uncertain in this business.這一行業成本估算有很大的不確定性。➤increasingly越來越不確定▸➤still還是不確定◇Whether diet is an important factor in this illness is still uncertain.飲食是否是這種病的重要致病因素仍然無法確定。➤inherently本質上不確定◇The world is inherently uncertain.世界在本質上是變幻莫測的。
BNC: 3532 COCA: 4291
uncertain adj.
⇨ uncertain (an uncertain future) ⇨ hesitant (uncertain steps) ⇨ unclear (It is uncertain what…) ⇨ unsure (uncertain about sth) uncertain

adjective

  ➡ See also the entry for variable 另见variable条uncertain ♦︎ volatile ♦︎ unstable ♦︎ fickle ♦︎ unsettledThese words all describe situations that are likely to change, especially in a negative or unpleasant way. 这些词均表示局势多变的、难预料的、动荡的。PATTERNS AND COLLOCATIONS 句型和搭配◆the uncertain / volatile / fickle nature of sth◆an uncertain / a volatile / an unstable situation◆an uncertain / unstable environment◆uncertain / fickle / unsettled weather◆an uncertain / a volatile temper / temperament◆very uncertain / volatile / unstable / fickle / unsettled◆rather / notoriously uncertain / volatile / unstable / fickle■ uncertain (rather formal, usually disapproving) likely to change, especially in a negative or unpleasant way 多变的，难预料的（尤指被视为负面的）◆Our future looks uncertain.我们前途未卜。◆He was a man of uncertain temper.他是个脾气让人捉摸不透的男人。OPP certain ⇨ certain ■ volatile ˈvɒlətaɪl; NAmE ˈvɑːlətl (disapproving, especially business 尤用于商业 or politics 政治) (of a situation) likely to change suddenly; easily becoming dangerous （局势）可能骤变的，不稳定的；容易变得危险的◆This is a highly volatile situation from which riots might develop.现在局势极不稳定，有可能发展成动乱。◆Exporting the product was difficult due to a volatile exchange rate.该产品的出口由于汇率波动剧烈而变得困难。ⓘ Volatile is typically used to talk about the exchange rate, the economy, a political situation and markets or market conditions. It also collocates strongly with character, nature and situation. * volatile通常用以描述the exchange rate、the economy、a political situation、market和market conditions，亦常与character、nature和situation搭配。■ unstable (disapproving, especially business 尤用于商业 or politics 政治) likely to change suddenly, often causing serious problems 可能骤变的，不稳定的（常引发严重问题）◆The political situation remains highly unstable.政局仍然十分动荡。OPP stable ⇨ steady ■ fickle (disapproving, especially journalism 尤用于新闻) changing often and suddenly 易变的；无常的◆Such is life in the fickle world of fashion.这就是变幻莫测的时装界的生活。◆The latest downturn in sales shows just what a fickle business this is.最近销售量的下降表明这个行业是多么不稳定。■ unsettled (rather formal) (of a situation) changing often; making people uncertain about what might happen next （形势）多变的，不安定的；不平稳的；动荡不安的◆These were difficult and unsettled times.这是艰难而动荡的时期。◆The weather has been very unsettled lately (= it has changed a lot).最近天气十分多变。

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