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in return for作为对…的回报,作为…的交换条件
例句：An answer or response in return for something done.
答谢，致谢为回报已做事情的答复或回复
2.However, it’s still far less than the government predicted.
far less比较级的修饰
1）a bit, a little, rather, much, far, by far, many, a lot, lots, a great deal, any, still, even等
2）还可以用表示倍数的词或度量名词作修饰语。
3）以上词(除by far)外，必须置于比较级形容词或副词的前面。
3.Yes, around a hundred thousand people visit the White House each month, so a pretty big list.
pretty除了作为形容词“漂亮的”之外，还可以用作副词，相当的，非常的，与fairly意思相似。