Americans were initially 14 for they had not raised the money to pay for the erection of the base.
美国人最初是14岁,因为他们没有筹集到建造基地的资金。
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It was a great honour to be invited backstage at the not-for-profit Panda Base, where ticket money helps pay for research, I was allowed to get up close to these cute animals at the 600-acre centre.