求翻译：　　春耕时，苏显文看到村民常常要用牛犁在山坡地、沙石地上耕地，有时还要互相借耕牛使唤，不仅吃力而且十分不便。于是，他冒出了发明机动犁代替耕牛的念头。2006年开始研究，直到2008年才设计出一个大概的模型。是什么意思？

Spring, Su Xianwen see villagers often use the ox-plow in the hillside, sand on the ground of cultivated land, and sometimes each other by cattle beck and call, not only difficult but also very inconvenient. So he shot up the idea of ​​the invention motorized plow instead of cattle. 2006 began to st

正在翻译，请等待...

　　When spring plowing, Su Xianwen saw villagers often with Niu Li in hillside cultivated land, sand on the ground, and%2