Historical long problem of powers sum is a problem that still quite gets solicitude so far.

历史悠久的幂和问题，是迄今仍然颇受关注的一个问题。

youdao

The real problem is that no affordable sum spent trying to stop smuggling has any effect on supply.

ECONOMIST: Round and round the coca bush

" Attending a workshop last weekend in Venice of the Council for the United States and Italy, I heard one of them sum up the problem as succinctly as a French aphorist: "The growth agenda is nice to say but difficult to fill up.

WSJ: Henninger: Would Harry Truman Blame Paris?

One problem with SPIAs is that the lump sum given to an insurance company goes away permanently.

FORBES: Immediate Annuities Aren't for Everyone