1.There's a shrub called Betula glandulosathat is progressing north very rapidly.

有一种叫做 Betula glandulosat 灌木正在迅速向北移动。机翻

2.Intermingled with the pines were shorter, ragged-looking trees with lumpy trunks, wizened branches and fine twigs like gnarled fingers: Betula pubescens, downy birch.

与松树混在一起是矮、参差不齐树，树干粗糙，树枝干枯，细枝像多节手指：白桦、绒毛桦树。

3.Betula occidentalis , the only birch, is a small, slender tree restricted to the eastern flank of the range along stream-sides below the pine-belt, especially in Owen's Valley.

Betula occidentalis 是唯一白桦树，是一种细长树，仅限于松树带下方沿溪流两侧分布东侧，尤其是在欧文谷。机翻