英语翻译what then is the difference between the two cases insofa

英语翻译
what then is the difference between the two cases insofar as rate of output is concerned?(an assertion that I plan to defend in more detail ),provided that Mr.M and Mr.H can be excluded from consuming the publlic good if they fail to pay for it,which,of course,is implicitly assumed to be ture in the joint supply problem.
There is nothing in the public good concept that disallows the ability to exclude.Frequently,there is confusion between the public good concept,as I understand it,which states that it is possible at no cost for additional persons to enjoy that name unit of a public good,and a different concept ,that might be identified as a collective good ,which imposes the stronger condition that it is impossible to exclude nonpurchasers from consuming the good.The technology of morden weaponry may in fact make it difficult to exclude nonpurchasers from benefiting from national defense purchases ,and national defense might be termd an "approximate public good." Ability to exclude nonpurchasers is compatible with both private and public goods.
有点急，一楼那种就无视了，再次提高悬赏求翻译，求求“高手”们行行好，不要再拿百度翻译的来糊弄我了，虽然我没本事翻译这句，但是基本的汉语能力还是有的