Being hopelessly used at work place

A postdoc in our department performed out a few interesting experiments recently and prepared a manuscript for publication. After reading the manuscript, his boss (as a corresponding author) added another person's name as a co-author. This person is a PhD student in the lab, who simply cannot get anything useful out of his bench work (or put this way, nothing seems to work in his experiments). The reason his name has been included in the manuscript is that the boss wants his PhD student to have at least something to show, which will help him graduate in due course. The postdoc feels being used, but is hopeless about it. What a shame.

沒有什麼選擇,許多人都是這麼過來的.

就這麼點小事還叫喚? 反正不是第一作者, 你就做個順水人情算啦.

If this happened to my paper, it is all right if the first author is still the same person. It seems to me that the boss is very nice to his student.

In essence, this boss wants to see his PhD student graduating in time, or he will lose face (ie, showing no ability to train PhD student successfully).