Pyrus betulae-folia Bge.

例句：

1. 1. The forest was dense with thetall trees of the Pyrus betulae-folia.
   森林里满是欧洲白杨的高耸树木。
2. 2. Thewhite bark of the Pyrus betulae-folia is a distinctive feature of thisspecies.
   杨树的白色树皮是这种物种的一个独特特征。
3. 3. ThePyrus betulae-folia is an importantsource of timber and fuelwood inmany parts of Europe.
   杨树在欧洲许多地方是重要的木材和燃料木的来源。