看到这句话：

Up to this point I still haven’t receive the tracking number that you promised.

up to this point，在百度这边搜到的是“到目前为止”的意思，相当于so far。但在谷歌搜出来的都是up to a (certain) point这个词。

up to a (certain) point的英文解释：

used to indicate that a statement is partly but not completely true

用来表示一个陈述部分正确但不完全正确

partly, or to a limited degree

部分地，或在一定程度上

If you say that something is true up to a point, you mean that it is partly but not completely true.

如果你说某件事在up to a point上是真的，你的意思是它部分是真的，但不是完全是真的。

例句：

I understand his feelings up to a point.

在某种程度上，我理解他的感受。

Competition is good but only up to a certain point.

竞争是好的，但只是在一定程度上。

Of course there is some truth in all this, but only up to a point.

当然，这一切都有一定的道理，但只是在一定程度上。

The new traffic system worked up to a point, but it had its problems.

新的交通系统在一定程度上取得了成效，但也存在一些问题。

'Was she good?'—'Mmm. Up to a point.'

“她好吗?”——“嗯。在某种程度上。”

It worked up to a point.

它在一定程度上起了作用。

"up to the point" 和 "up to a point"有什么区别？

观点一：

"Up to a point" is a phrase meaning "to some extent" or "partly".

“Up to a point”是一个短语，意思是“在某种程度上”或“部分地”。

A:"Do you agree with free speech for everyone?"

"你同意每个人的言论自由吗？"

B:"Up to a point, but not if they are inciting crime or hatred."

"在一定程度上，但如果他们是在煽动犯罪或仇恨，则不同意。"

"Up to the point" is not a phrase in itself (except that it is a group of words) and only has meaning as part of a longer sentence.

“Up to the point”本身并不是一个短语（除了它是一组词），只有作为一个较长句子的一部分才有意义。

A:"Did you enjoy the film?"

"你喜欢这部电影吗？"

B:"Only up to the point where the hero got married. It was boring after that."

"只喜欢到男主人公结婚的地方。之后就很无聊了。"

观点二：

There’s no real difference, except that “up to the point” is usually followed by a phrase that explains what point you mean - for example, “up to the point of no return.” “Up to a point” is usually used without any explanation following.

没有什么真正的区别，除了“up to the point”后面通常会跟着一个短语来解释你的意思——例如，“up to the point of no return”。“Up to a point”通常在使用时，后面没有任何解释。

观点三：

It is the same as the difference between “a” and “the”.

“a” 和 “the”是一样的。

以上三个观点来自：
https://www.quora.com/What-is-the-difference-between-up-to-the-point-and-up-to-a-point

出处：头条号 @猫眼儿Zz