Take 3 COINS (or tokens or buttons, but really, COINS are best) and label them 1-30 with a washable magic marker.
取30个硬币(代币或钮扣都行，但说实话，硬币最好)，然后用魔笔在上面分别标上1 - 30。
"She's Mafalda Hopkirk, " he said, reading a small card that identified their victim as an assistant in the Improper Use of Magic Office. "You'd better take this, Hermione, and here are the tokens.
“她是马法尔达·霍普柯克，”他念着一张小卡片，被击昏的那人是禁止滥用魔法司的一名助理，“你最好拿着这个，赫敏，还有证明币。”
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