As far as we know, no other animal has this relationship with the human face.就我们所知没有其他动物会对人的脸部表情做出这样的反映

as far as:就 ... 而言

As far as I know, he is kind.

就我所知，他人不错。

As far as I could remember, I did return him the money.

就我所能记得的，我确实把钱还给他了。

Equally, it makes sense for a dog to approach somebody when they're smiling.相应地，这就解释了当人们微笑狗狗就会接近他们的原因

make sense:讲得通； 有意义； 言之有理

The sensations begin to make sense.

这些感受开始有意义。

She doesn't talk much,but what she says makes sense.

她讲话不多，但言之有理。

Evidence like this appears to underpin our conviction这样的证据令我们深信

appear to:看来像是； 看来似乎

These stars appear to move around the North Star.

这些星星似乎环绕着北极星转。

They appear to be able to handle the problem.

他们似乎可以处理这个问题。