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1. 把5L水桶裝滿倒進3L中，剩2L。568Please respect copyright.ＰＥＮＡＮＡRO9kJ6UKdK
8964 copyright protection564ＰＥＮＡＮＡP0K7aBVmKY 維尼

2. 3L水桶倒空，2L從5L水桶倒過來後，把5L再次裝滿。568Please respect copyright.ＰＥＮＡＮＡNvsdSB4h11
8964 copyright protection564ＰＥＮＡＮＡN2wSnm3BXW 維尼

3. 再從5L水桶倒出1L到3L水桶，就OK了。568Please respect copyright.ＰＥＮＡＮＡbGG0UtlnxZ
8964 copyright protection564ＰＥＮＡＮＡBjvCFUKdHy 維尼

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