不能肯定

Well, we are not sure about this, and very few pieces of software can tweak PDF files.

那麼，我们不能肯定这一点，很少件软件可以调整的PDF档案。

The lack of a common standard for tags and readers to begin with, and the later battle between various high frequency and ultra-high frequency products meant you could not be sure the data on a tag could be read all along the supply chain.

标签和读取装置缺乏一个通用标准来作为最初的设计基础，随后的各种高频和超高频产品之间的竞争则意味着制造商不能肯定制造的标签中的信息可以在供给链中的每个环节都可以读出。

Review the script and pay special attention to both their pronunciation and their unadulterated usage of English in daily life.

我想那是对的，不过我也不能肯定。4。你昨天在校园里遇到的那些人是英国人。

I'm still uncertain of my feelings for him.

我仍不能肯定我对他的感情。

No, I'm uncertain about them.

我不能肯定。

I'm uncertain of their stand in the matter.

我不能肯定他们在该事件中的立场。

I'm afraid I'm unsure of the facts of the case.

很遗憾我不能肯定这件事的事实。

I wasn't sure, but I said,"Yes, sir."

我不能肯定，但是我说，"是的，先生。"

Or, take the easy way and invest in a water meter if you are not sure.

还是采取最简单的办法，并投资于一个水表，如果你不能肯定。

I'm not sure whet her to spend my holiday in Beijing .

我还不能肯定是否在北京度假。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。