I had not then understood that, in certain conditions, the system could be in equilibrium with less than full employment.

那时我还不明白，在某些情况下，系统可能会在未充分就业的情况下达到平衡。

There will be a determinate amount of increase in the quantity of effective demand which, after taking everything into account, will correspond to, and be in equilibrium with, the increase in the quantity of money.

有效需求量将有一定数量的增加，在考虑到所有因素后，将与货币数量的增加相对应并与之保持平衡。