That is the overall ratio, not the marginal ratio。We are

not talking about D/G，but dD/dG。

 

所有跟帖： 

• Your "$6 of debt" is D--not "dD" -career- ♂ (0 bytes) () 01/07/2019 postreply 10:36:35

• "你说工作效率低，我指出工作量不会减少，你现在又换到经济效益……你多久没见识过变化了，鸡同鸭讲" -career- ♂ (5412 bytes) () 01/07/2019 postreply 12:16:47