同学你好，该知识点来自沪江网校《【Uni智能】雅思7分一站式VIP-大学起点【现金奖励班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好，解答如下，希望能帮到你：
Perhaps the most plausible suggestion as to why leaves would go to the trouble of making anthocyanins when they’re busy packing up for the winter is the theory known as the ‘light screen’ hypothesis.

Perhaps the most plausible suggestion as to… is …这是句子的结构模式，表示“也许最具有说服力的建议是”

why leaves would go to the trouble of making anthocyanins  表示 “为何树叶会一直制造花青素”

when they’re busy packing up for the winter   表示“当他们为冬天来临做准备的时候”

is the theory known as the ‘light screen’ hypothesis.  表示“这个理论被称为“光幕”假说。”