In particular, we investigated four treatments: one with primarily a few large denomination bills, one with several small denomination bills, one with a large amount of coinage, and one empty.
具体说来,我们调查研究了四种情形:一种是几张面额相当大的钞票,一种是若干小面额的钞票,一种是大量的硬币,还有一种就是空箱子。
The U.S. Government also issues small denomination debt to individuals to help them called savings bonds, but we aren't talking about those.
美国政府也发行小面值债券,用于面向个人,叫做长期储蓄债券,我们今天不涉及这些
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