Unclear的意思是指不清楚。
读音：英 [ˌʌnˈklɪə]。
常作为形容词：表示不明确的、不明朗的、含糊的、不明显的、怀疑的、茫然的。
近义词：
1、dima：光线暗淡的，看不清的；记忆力模糊的；不大可能的。
Don't work in dim light.
不要在昏暗的光线下工作。
2、uncleara：指句意、字迹不清楚，使人难以看懂；不肯定的。
Unclear writing is difficult to understand.
模糊的字迹使人难以辨认。
3、vaguea：含混的，不清楚的，多用于比喻意义，用来表示因逻辑关系不清、言辞笼统而导致的意义不清楚，该词也可表示轮廓形状的不清楚和模糊。
He has some vague ideas about what to do, but nothing specific.
他大概知道他要做什么，但没有具体的计划。
4、obscurea：用于表达因光线不足而使人看不清楚。该词的引申意义可以表示语法、文字、记忆等因复杂、深奥、模棱两可而使人看不懂和无法理解。
The poetry of Ezra Pound is sometimes difficult to understand because it contains so many obscure references.
艾兹拉-庞德的诗有时候难以理解，因为诗歌中含有许多令人费解的典故。
5、ambiguousa：意义含糊的，有歧义的，指因字、词、句有歧义而使人感到模糊不清、难以理解和把握。
His ambiguous directions confused us; we did not know which of the two roads to take.
他的模棱两可的指导使我们很迷惑；以至于我们不知道该走哪条路了。
相关例句：
1、Users are still unclear about what middleware does.
用户对中间件的作用仍有疑问。
2、They are often unclear about the career goals to reach.
他们通常不确定要达到的职业目标是什么。
3、Since the government’s attitude is unclear, public confidence in the market is waning.
由于政府的态度尚未明朗，市场人气看低。
4、The incident is still developing, and the outcome/consequence is unpredictable/unclear at this moment.
事态正在发展，了局尚难预料。
5、How long does it take for him to recover remains a mystery/is still unclear.
他什么时候能够康复还是个未知数。
6、The situation is unclear at this hour.
目下局势不明。
7、It was unclear if that was the cause—or if breakfast-skippers were just more likely to be overweight to begin with.
目前还不清楚这是否是原因，又或者是不吃早餐的人一开始就更有可能超重。
8、It was unclear whether the vice president was in any of the vehicles.
不能确定副总统是否在其中。
9、Air traffic control authorities will also unclear how the loss of Flight 007?
航空管制当局又怎么会不明不白的丢失了007航班？
10、Under the conditions of unclear information, the compelling force can move towards self-strengthening.
在信息不透明的条件下，这种强制力能够自我强化。