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1. 把5L水桶裝滿倒進3L中，剩2L。571Please respect copyright.ＰＥＮＡＮＡKQARaWjchQ
8964 copyright protection567ＰＥＮＡＮＡ5QR118b35Z 維尼

2. 3L水桶倒空，2L從5L水桶倒過來後，把5L再次裝滿。571Please respect copyright.ＰＥＮＡＮＡawbgjCJWOM
8964 copyright protection567ＰＥＮＡＮＡak1uzOz7Vl 維尼

3. 再從5L水桶倒出1L到3L水桶，就OK了。571Please respect copyright.ＰＥＮＡＮＡ74EuY8L4NP
8964 copyright protection567ＰＥＮＡＮＡvVFDYmcqT0 維尼

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