不能肯定

But denote not so much a condition of uncertainty as a quantity imprecisely known

但它们表示的与其说是不能肯定的状态，不如说是一个知之不确的数量

I am not sure why it is only in pine monoculture that grey squirrels don't drive out the red - do you know.

我不能肯定为什么灰色松鼠仅在林相单一的地方不会逐出红色松鼠-您知道吗？

I do not know, sir,' said I. I am not very sure whether he's sane.

"我不知道，先生，"我说，"我不能肯定他是否精神正常。"

I do not know, sir, said I. 'I am not very sure whether hes sane.

"我不知道，先生，"我说，"我不能肯定他是否精神正常。"

We won't tell if you decide to take a dip sans swimsuit.

我们不能肯定你是否有打算不穿泳衣游泳。哈哈！！！

I'm uncertain whether to go or not.

我不能肯定去还是不去。

I cannot say for sure if it was your visual illusion.

我不能肯定这是不是你的视错觉。

XmMHt%hJ I cannot say for sure if it was your visual illusion.

我不能肯定这是不是你的视错觉。

The earliest and reliable Castanopsis fossil records date back at least to Eocene, and subfamily Castaneoideae fossil records found from Paleocene, it is indicated that appearance of Castanopsis is not later than Paleocene . All fossil records of Fagaceae and Castanopsis report from the Northern Hemisphere and their main distribution regions are in the Northern Hemisphere . It can be concluded that the Northern Hemisphere is the center of origin of Fagaceae and Castanopsis . However, owing to the discrepancy between fossil data and results of modern botany research as well as scarcity of fossil data from key area, precise center of origin of Castanopsis cannot be inferred.

栲属在地质历史上有着比现在广泛的分布，最早、最可靠的栲属化石记录发现于始新世地层，栗亚科化石在古新世就有发现，化石记录表明栲属起源的时间不晚于古新世，所有的壳斗科及栲属的化石都发现于北半球，现代分布也主要在北半球，壳斗科及栲属起源于北半球可以确认，由于化石证据与现代植物学的研究结果有较大差异以及关键地区化石证据的不足，具体的起源地尚不能肯定。

Then he put his head on one side, and looked at me.

他问。 &我不知道，先生，&我说，&我不能肯定他是否精神正常。&

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了