托福听力里面的一句话 求翻译That is when it’s not covered in snow and there is no frost covering

托福听力里面的一句话 求翻译That is when it’s not covered in snow and there is no frost covering

There is no frost covering the grass and, umm, vegetative parts of a plant’s herbs and the flowers the marmots like to eat.
这句话中，cover后面接的名词有the grass, vegetative parts 以及the flowers.整句话的意思是说没有霜覆盖草地，植物的vegetative的部分，还有花，而这些草地啊，vegetative part和花是土拨鼠爱吃的。所以，growing season指的是土拨鼠吃的东西可获取的时间段。

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