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1. 把5L水桶裝滿倒進3L中，剩2L。597Please respect copyright.ＰＥＮＡＮＡHOWM7Lz1eF
8964 copyright protection593ＰＥＮＡＮＡY9WX9F0Xsj 維尼

2. 3L水桶倒空，2L從5L水桶倒過來後，把5L再次裝滿。597Please respect copyright.ＰＥＮＡＮＡFqw4hq1mlV
8964 copyright protection593ＰＥＮＡＮＡs8V2AOdRsP 維尼

3. 再從5L水桶倒出1L到3L水桶，就OK了。597Please respect copyright.ＰＥＮＡＮＡ670G2idwbQ
8964 copyright protection593ＰＥＮＡＮＡ4LkUfdLuzV 維尼

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