It is unclear whether the growing number shows a real increase or comes from more knowledge about this disorder.

尚不清楚人数的增多究竟是真的增长，还是人们对这种疾病认识的增多。

These reasons will lead, as a rule, to a greater proportion of income being saved as real income increases.

这些原因通常会导致随着实际收入的增加，更大比例的收入被储蓄起来。