不能肯定

I can't be certain/sure about….

对…我不能肯定。

The researchers point out that there are many things they cannot be sure about.

研究人员指出，有很多事情他们不能肯定。

I think that is right, but i cannot be sure of that .

我想那是对的，不过我也不能肯定。

I think that's right,but I can't be sure of it.

我想那是对的，不过我也不能肯定。

I think it was right, but i can not to be sure.

我想那是对的，不过我也不能肯定。

I think it is right, but I can not be sure.

我想那是对的，不过我也不能肯定。

I think it is right, but i can't be sure.

我想那是对的，不过我也不能肯定。

I think that's right,but I can't be sure.

我想那是对的，不过我也不能肯定。

Two Anglo-Saxon manuscripts at the British Museum, one of which may be as old as the year 1030, show that the words "Ave Maria" etc. and "benedicta tu in mulieribus et benedictus fructus ventris tui" occurred in almost every part of the Cursus, and though we cannot be sure that these clauses were at first joined together so as to make one prayer, there is conclusive evidence that this had come to pass only a very little later.

两个盎格鲁-撒克逊人的手稿在大英博物馆，其中之一可能是由於旧的一年1030 ，显示字样"圣母颂"等，并且" benedicta涂在mulieribus等benedictus药材云地利推"发生在几乎每一个组成部分该cursus ，虽然我们不能肯定的是，这些条文都是在第一次连接起来，从而使一个祷告，有确凿的证据证明这已经到了只能通过一个非常小。

I think it's safe, but don't bet on it .

我认为它是安全的，但不能肯定。

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。