是什么驱使一只鱼龙咬另一个鱼龙的鼻口部仍未可知。
What led one ichthyosaur to bite another on the snout is unknown.
但是，就像任何这类研究一样，原因尚未可知——即，还不清楚不吃早餐是否能导致他们更容易超重。
But as with any study of this kind, it was unclear if that was the cause—or if breakfast-skippers were just more likely to be overweight to begin with.
就像任何这类研究一样，原因尚未可知，究竟是出于这一因素，还是那些不吃早餐的人本来就更容易增重。
As with any study of this kind, it was unclear if that was the cause—or if breakfast-skippers were just more likely to be overweight to begin with.
这一切在何时何地发生尚未可知。
这是否能防止房产产生泡沫并未可知。
Whether that would have stopped the housing bubble is open to question.
谁将会接任哈尔德的首相之职尚未可知。
多能性的这种明显缺失是否是普遍的尚未可知。
Whether this striking absence of pluripotency is universal is still unknown.
世界是否能够策划出那种有序再平衡还未可知。
Whether the world can engineer that kind of orderly rebalancing is an open question.
人的本质从未可知。
纳扎尔巴耶夫先生是否会继续掌权达三十年整仍未可知。
Whether Mr Nazarbayev will go ahead and treat himself to a full three decades in power remains to be seen.
但是这些措施能否足以达成所需的燃油节约效果仍未可知。
But it is unclear whether these will be enough to achieve the required fuel savings.
这些才是我们怎样来对待未可预见境遇所应该采取的选择。
但Android能否帮助谷歌进军手机广告市场仍未可知。
But its ability to help Google expand in the mobile-ad market remains unproved.
项目的结果，起码在早期，也未可知，但毫无疑问，值得一试。
The project's outcome, at this early stage, remains uncertain. But it is surely worth a try.
传言娜塔莉·波特曼将出演这部电影，但其是否出镜尚未可知。
Natalie Portman was rumored to be semi-attached to that project, but whether that's still the case remains to be seen.
Sun的数据仓库合作伙伴关系以及开源数据库前景均未可知。
Unknown future for Sun's data warehouse partnerships, open source database.
关于该纵火嫌疑人的调查仍在继续，是否会对其提出公诉还未可知。
The investigation continues and it's not yet known if the man will be charged.
职业转变是一个选择，通常需要退后一步，最终的结果也未可知。
That's an option, but it often requires a step downward, and the ultimate result is uncertain.
这部分不断修复，常有未可靠修复的微裂缝，可导致移植的重大失败。
These sections, via repetitive loading, are subject to microfractures that are not reliably repaired, and which can result in catastrophic failure of the graft.
葡萄糖对病毒感染有益却对细菌感染有害的具体生物学细节还尚未可知。
The precise biological details of why glucose is good for viral infections and bad for bacterial ones are not yet known.
此外，2020年的探测器探索火星时能否做到与现有蓝图一致也未可知。
Plus it's unclear how well the 2020 rover will mesh with existing blueprints for Mars exploration.
一千多名铁路工人正在抢救破坏的铁路线，但是铁路何时恢复运输尚未可知。
More than 1,000 workers were repairing the damaged rail line, but it was unknown when traffic would resume.
作者对其的解释和外推并未经过任何决定性的实验，而且他们能否这么做也未可知。
The authors’ interpretations and extrapolations of it have not been subjected to any decisive tests, and it is not clear that they ever could be.
中国正在再次阻止人民币升值，至于它是否打算放弃重商主义的增长战略，目前尚未可知。
China has again been preventing the renminbi from strengthening and the jury is still out on whether the country intends to depart from its mercantilist growth strategy.
中国正在再次阻止人民币升值，至于它是否打算放弃重商主义的增长战略，目前尚未可知。
China has again been preventing the renminbi from strengthening and the jury is still out on whether the country intends to depart from its mercantilist growth strategy.
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