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1. 把5L水桶裝滿倒進3L中，剩2L。598Please respect copyright.ＰＥＮＡＮＡYh3LW9NJcS
8964 copyright protection594ＰＥＮＡＮＡOnGozFBHHC 維尼

2. 3L水桶倒空，2L從5L水桶倒過來後，把5L再次裝滿。598Please respect copyright.ＰＥＮＡＮＡubxAxdvtpc
8964 copyright protection594ＰＥＮＡＮＡTJwig9PTWZ 維尼

3. 再從5L水桶倒出1L到3L水桶，就OK了。598Please respect copyright.ＰＥＮＡＮＡac2cQnGPOp
8964 copyright protection594ＰＥＮＡＮＡbQ2HuDic8u 維尼

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