Below the main forest belt the trees likewise diminish in size, frost and burning drought repressing and blasting alike.

主林带以下的树木同样变小了，霜冻和灼热的干旱同样压制和爆发。

I was then in the edge of the main forest belt at a small foot-hill town called Knoxville, on the divide between the waters of the Feather and Yuba rivers.

那时我在一个叫做诺克斯维尔的小山脚小镇的主要森林带的边缘，在羽毛河和尤巴河之间的分水岭上。