Hmm, I'm not so sure about that.

我对此可不敢确定。

I'm not so sure about that. All right, thanks, Mike.

这点我可不能确定。好吧，谢谢你，迈克。

Whether this individual was thirty-five or fifty years of age, I could not precisely state.

这人究竟是三十五岁还是五十岁，我可不能确定。

I don't know about that. - Just go.

可我也不确定 -去吧。

No matter what technology mankind develops in the future, we can be sure that it will offer an opportunity to exercise the dark side of our potential.

不管将来人类发展出什么样的科技，我们都可确定它必然会提供我们机会去运用我们潜力的黑暗面。

It is the first to compare organic and conventional agriculture across the main goals of sustainability identified by the National Academy of Sciences: productivity, economics, and environment.

美国国家科学院确定的可持续发展主要目标为：生产力、经济和环境。而这是第一在此发展目标上比较有机农业和常规农业的研究。

Labs including full blood count, liver enzymes and serology can be useful to identify the cause and an upper GI Endoscopy can identify esophageal varices in order to treat them appropriately.

包括全血细胞计数、肝酶和血清学在内的实验室检查，可用于确定病因；上消化道内窥镜检查可以识别食管静脉曲张，以便对其进行适当治疗。

But you were sure. Shall I tell you what I think has altered you? My prospects! Because nothing else has changed! - No. - Yes!

可当初你已经确定了。想听听我怎么想的吗？是我的前途让你犹豫了！只有这点变了！-不是的。-就是这样！

Indeed, for these the match was so good that their ages could be determined to within a year of the truth.

的确，对于这些样品来说，吻合度如此之，以至于对其年代的确定可精确到一年以内。

When lightning sparks across the sky, it sends out low-frequency radio waves that researchers can use to determine its location.

闪电划过天空之时，会释放出低频无线电波，研究人员可利用这种电波确定闪电的位置。

Well, you know, I totally would, but I'm not sure we like the same sorts of music, you know?

我很兴，可我不确定我们玩的是同一类的音乐。

Now, essentially what we've had set up this week is a high-pressure system essentially parked over the central U.S.

现在，基本上，本周可确定的是一压系统停在美国中部。

" Pretty sure" is not very scientific. Is this how you normally work? Just hunches and guesses and stuff?

“相当确定”可不够科学。你通常就是这么工作的吗？就是靠感觉和猜测什么的。

The following July it became the first ship to fly past our planetary neighbor—that we're sure of.

第二年的7月它成为首飞过我们目前可确定的邻居行星的飞船。

Glad to be back? - I'm never sure. When I'm in London, I long for Yorkshire.

回来了兴吗？ - 我可真不确定，在伦敦时，我渴望回到约克郡。

NOW, THE SYSTEM WAS DESIGNED TO PRIORITIZE ACCORDING TO HOW MUCH WATER WAS AVAILABLE.

现在，系统设计为根据可用水量确定优先。

The different patterns in the venom can be used to determine the snake species.

毒液中的不同图案可用于确定蛇的种类。

" Ascertain" simply means to make certain of.

" 确定" simply means to make certain of.注：根据要求，此处保留了英文解释部不变，仅将“ascertain”翻译为“确定”。若需完全翻译成中文可改为：“确定” simply 表示使某事确定无疑。但为了忠实于原文结构，采用了上述翻译方式。

They identified marketable skills and sources of job leads.

他们确定了可市场化的技能和潜在的就业机会来源。

This is true even if the reversionary interest is determinable or defeasible.

即使回溯权益是可确定的或可废止的， 这一事实依然成立。