英语语法分析

But scientists have the tools to engineer crops that can benefit far needier populations.

但科学家们有办法研制出造福更多民众的作物。

A hail of needier shards arced up and over the top of the slope, impacting the surfaces around them.

针弹碎片冰雹弧线形飞越了斜坡的顶面，撞击着他们周围的表面。