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1. 把5L水桶裝滿倒進3L中，剩2L。611Please respect copyright.ＰＥＮＡＮＡuO1hUYdU0A
8964 copyright protection607ＰＥＮＡＮＡRYu8WJUqnI 維尼

2. 3L水桶倒空，2L從5L水桶倒過來後，把5L再次裝滿。611Please respect copyright.ＰＥＮＡＮＡMAGsRa6uo8
8964 copyright protection607ＰＥＮＡＮＡpvJq4AkqvM 維尼

3. 再從5L水桶倒出1L到3L水桶，就OK了。611Please respect copyright.ＰＥＮＡＮＡhD25wxbnZb
8964 copyright protection607ＰＥＮＡＮＡveFK53GDfS 維尼

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