兄xiōng妹mèi两liǎng个gè疑yí惑huò不bù解jiě地de望wàng着zhe爸bà爸ba，问wèn：“这zhè是shì做zuò什shén么me呢ne？”
“孩hái子zi们men，把bǎ落luò叶yè埋mái在zài树shù下xià面miàn，是shì为wèi了le给gěi树shù木mù提tí供gōng肥féi料liào，好hǎo让ràng它tā有yǒu充chōng足zú（多到能满足需要）的de营yíng养yǎng，这zhè样yàng，明míng年nián我wǒ们men就jiù可kě以yǐ得dé到dào更gèng多duō更gèng好hào吃chī的de果guǒ子zi了le。”
“原yuán来lái是shì这zhè样yàng啊a！”兄xiōng妹mèi俩liǎ欢huān快kuài地de干gàn了le起qǐ来lái。
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