我来自一个三口之家：妈妈，爸爸和我。
I come from a family with three members: my mother, my father and me.
于是他们组成了一个三口之家，继母，她的丈夫及他。
Thus they for a family of three, the stepmother, her husband and his 16-year-old daughter.
平日里养成节水习惯，积累下来，仅一个三口之家每月就能节水1吨以上。
If insist water- saving habit, a three-member-family can save water more than 1 ton monthly.
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