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More than 170 hectares were afforested, reducing water runoff from the hillsides.超過170公頃的土地已植有林木, 以減少雨水從山坡流下.At first the wooded hillsides muted the sounds.最初長(zhǎng)滿樹木的山坡吸收了噪音。That forced peasant farmers to try to eke a livin...