Information in a biological passport can help catch athletes who use banned drugs but find ways to avoid testing positive for them.
VOA: special.2011.04.12
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
"The students are on their own to find tickets, but I help them."
VOA: standard.2010.02.26
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