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1. 把5L水桶裝滿倒進3L中，剩2L。573Please respect copyright.ＰＥＮＡＮＡ0ydPA8YZ4H
8964 copyright protection569ＰＥＮＡＮＡFf9JEHqbqu 維尼

2. 3L水桶倒空，2L從5L水桶倒過來後，把5L再次裝滿。573Please respect copyright.ＰＥＮＡＮＡWTiLNI9f24
8964 copyright protection569ＰＥＮＡＮＡgO3cIhgflE 維尼

3. 再從5L水桶倒出1L到3L水桶，就OK了。573Please respect copyright.ＰＥＮＡＮＡKiM62LKECN
8964 copyright protection569ＰＥＮＡＮＡcwWxZne6Ow 維尼

3.145.85.3