派特博士命令赛小息、卡璐璐和阿铁打以最快的速度赶往地球最后的煤炭基地。对待知识,卡璐璐永远都是最认真的,她好奇地问:“博士,煤到底是一种什么东西啊?”赛小息连忙说:“卡璐璐,你真是孤陋寡闻。煤是一种黑色矿石,能当燃料使用。煤矿资源在几十年前就枯竭啦!不过,当年我在地球捡拉圾时,偶尔会碰到一块。每次捡到煤,老爸都非常高兴,因为煤已经不多了,可以卖大价钱!”卡璐璐不服气地说:“那么黑、那么难看的石头,怎么会值钱呢?像我这么爱干净的女孩,是无论如何也不会碰它的。” Dr. Pirates ordered the game interest rates, Callu Lu and Atrak hit the quickest speed to the earth’s last coal base. Treat knowledge, Callulu will always be the most serious, she curiously asked: “Dr., in the end is what kind of coal ah?” Race interest rates quickly said: “Callulu, you are really ignorant. Is a black ore that can be used as a fuel. Coal resources dried up decades ago! However, when I picked up the garbage on Earth, occasionally met a piece of coal every time you pick up, dad are very happy , Because coal is running out, you can sell big price! ”“ Callulu unconvinced to say: ”so black, so ugly stone, how would it be worth? Like I love clean girl, in any case Will not touch it. "