1. 把5L水桶裝滿倒進3L中，剩2L。663Please respect copyright.ＰＥＮＡＮＡiPiBpNq2Tq
8964 copyright protection659ＰＥＮＡＮＡfkyqLNLj8S 維尼

2. 3L水桶倒空，2L從5L水桶倒過來後，把5L再次裝滿。663Please respect copyright.ＰＥＮＡＮＡBDxaYOUtb2
8964 copyright protection659ＰＥＮＡＮＡ5DP02DZFJi 維尼

3. 再從5L水桶倒出1L到3L水桶，就OK了。663Please respect copyright.ＰＥＮＡＮＡWjWcJO1L1z
8964 copyright protection659ＰＥＮＡＮＡv1UBq93hF2 維尼

216.73.216.238