⑩balance/'bæləns/n.平衡

　　keep/lose one's balance保持/失去平衡

　　⑪over time长此以往，日积月累

　　⑫remove/rI'muːv/vt.移开，挪走

　　⑬erosion/I'rəʊʒn/n.侵蚀；(土壤)流失

　　⑭which引导非限制性定语从句，which指代整个主句的内容。

　　⑮agree with同意(某人的观点)

　　agree with也可表示"(气候、食物等)适合"。

　　⑯if so如果这样的话。该句的完整形式为if it is so。

　　积少成多

　　[第1～3段译文]

　　用5元钱你能做什么？或许你觉得做不了很多。嗯，你如果对买一袋糖果或甜点不感兴趣，那(用这钱)买一棵树如何？是的，确切地说是黄河岸边的一棵树。

　　每年，大约有16亿吨泥土流入黄河--中国第二长河。这些泥土中含有保持该地区自然界平衡的物质。长年累月，大量的泥土被冲走，导致黄河两岸严重的水土流失。在山西省有些地区，这种水土流失几乎毁掉了所有的土地，还迫使当地许多农民迁移到其他地区。

　　控制黄河水土流失是一项巨大的工程。很多人认为这种工作最好由政府或国际组织承担。你可能会同意这个观点。若真这样想的话，现在到了你重新考虑的时候了。

　　In fact, it is you who have the most important role to play in⑰ stopping Yellow River erosion⑱. Did you know the importance⑲ of your 5 yuan? For a start⑳， it can buy you a tree, which will help make soil stay on the land. On land with rich soil, local farmers can grow crops\s\up1(21(21)to make a living\s\up1(22(22). With the money they earn from their crops\s\up1(23(23)， farmers buy goods or services. This helps to develop local economies\s\up1(24(24).

Still puzzled\s\up1(25(25) how your 5 yuan can have so much effect\s\up1(26(26)？ Well, just take a look at the fact below. Since 1997, a tree­planting\s\up1(27(27) programme has changed the Jiuchengong Valley\s\up1(28(28)in Inner Mongolia into a green homeland\s\up1(29(29). Visitors from all over the world now come to admire this great achievement. What is more\s\up1(30(30)， the success of the programme has greatly improved the lives of the local people. Just think: all this started with\s\up1(31(31) 5 yuan! So when you have 5 yuan in your pocket next time, think twice\s\up1(32(32) about how to use the money.