After much cogitation he rejected the offer .

做了仔细思考之后，他还是拒绝了邀请。

After much cogitation I have decided to resign .

我经过再叁考虑後决定辞职。

It is not cogitation ; it is a waste of life .

其实没必要想那么多，那只是在浪费生命。

You are affecting my cogitation .

你影响己的思考了。

Cogitation about preparation for setting up the system of reduction of hospital assets .

关于建立医院资产减值准备制度的思考。