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1. 把5L水桶裝滿倒進3L中，剩2L。596Please respect copyright.ＰＥＮＡＮＡvHwikhus7g
8964 copyright protection592ＰＥＮＡＮＡMShLEoQlQH 維尼

2. 3L水桶倒空，2L從5L水桶倒過來後，把5L再次裝滿。596Please respect copyright.ＰＥＮＡＮＡVIQNZVD6qm
8964 copyright protection592ＰＥＮＡＮＡRkpOhz4qMA 維尼

3. 再從5L水桶倒出1L到3L水桶，就OK了。596Please respect copyright.ＰＥＮＡＮＡ9EF2qbql8F
8964 copyright protection592ＰＥＮＡＮＡLsZHjZ1ii2 維尼

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