It was impossible to tell from his mien whether he was offended.

从他的面部表情无法判断他是否生气了。

He could tell from the place where she was standing that she was the pretty maiden he hadn't danced with.

他从她站的地点上可以看出来，她是没有与他一起跳舞的那个漂亮女孩。

I could tell from her expression that something serious had happened.

一看她的脸色我就知道出了很严重的事情。

You can tell from the lines on her face

你可以清楚的看见她脸上的皱纹

You can't tell from my appearance, but still.

虽然从我的外表发现不了什么，但我的确是。