It's too soon to give a definite answer.

现在给出一个明确答复还为时尚早。

She made no definite plans for her future.

她对自己的未来没有明确的计划。

We didn't have any definite proof.

我们没有任何确凿的证据。

There is no definite conclusion that can be reached from these studies.

无法从这些研究中得出确切的结论。

The police had nothing definite against her.

警方没有任何对她不利的确凿证据。

There has already been a definite improvement.

已经有了显著的改善。

That's a very definite possibility.

那是很有可能的。

Mary is very definite about this.

玛丽对此非常肯定。