From the looks on their faces, I surmised that they had had an argument.

看他们的脸色，我猜想他们之间发生了争执。

She surmised the truth.

她揣度事实。

Naturally, I could not have surmised that.

我自然是没法猜测到这一切。

He surmised that this was the true situation.

他推测这就是真正的情势。

Does this simply imply, as many have surmised.

这是否就如很多人推测的那样。