Meaning of 元は in Japanese

In the midst of the dollar falling hard against the Yen and other major Eastern currencies the Chinese Yuan, with China effectively taking a 'dollar peg' policy, has become cheap.

When you think about it, it's all Kenny's fault for being so obtuse.

They were able to identify him by his wrist watch.

His parentage was unknown to us.

You have lovely eyes, don't you?

The origin of the fire is unknown.

The dead body was identified by a mole on the cheek.