America is both by far the biggest donor to flood relief and the biggest source of other bilateral aid.
美国日前还是救灾的最大捐赠者，也是其它双边救助最大的来源。
2
Once the attack begins, websites can try to trace the sudden flood of traffic back to the source computer and filter it out, but even that's a complex process.
一旦攻击开始，网站可以尝试追踪突发洪水般的流量找到源计算机并对此加以过滤，但这是一个复杂的过程。
3
While this source of water is untreated, it's a cost-conscious way to flood-irrigate trees and small crops on residential acreage.