英语语法分析

It is necessary to successfully develop pretreatment technology, design specific bioreactor, and determine optimal technological parameters before efficient biogasification of crop stalks is achieved.

要实现秸秆高效厌氧消化和工程应用，需要解决秸秆预处理技术、专用反应器研制和发酵工艺参数优化三个关键技术问题。