equity injection什么意思?

equity injection什么意思?
原文如下：
You know,at each stage during this crisis,policy has been less than people expected,and that builds up a cumulative loss of credibility here.You know,I just heard someone this morning that somebody from Treasury is saying 'well we plan to begin these equity injections into banks within two weeks.' Two weeks!You know,Gordon Brown in Britain announced a plan on Wednesday,and they're going to do the equity injections in Britain tomorrow."