1.drain away 渐渐枯竭；流尽
The water will soon drain away.
水很快就会流尽。

2.wipe out 消灭；抹掉
You get into this situation when losses wipe out their capital and you need to nationalize your banks.
这样一来就会陷入这样的处境，要想抹掉银行的资本损失，你必须国有化这些银行。

3.by one's calculation 据...计算
By my calculation the income offset proposal will mean that anyone making an income of about $13, 500 will pay no taxes other than sales taxes.
根据我的计算，收入抵消政策意味着每个赚$13,500的人就只要缴销售税。