poplar

• A tall poplar tree once stood there
  该处曾有一棵高大的白杨树。
• The study on shading effect under poplar - crop intercropping system
  杨粮间作系统中林木遮荫作用研究
• Sawn timber - appearance grading of hardwoods - part 2 : poplar
  锯材.硬木按表观分级.第2部分:白杨木
• Feed additive from poplar bark extract
  杨树皮提取饲料添加剂
• Oak , poplar , maple , chestnut
  白杨叶枫树叶栗子树叶什么的
• Poplars thrusting their branches upward ; thrust out his finger
  白杨的枝干向上生长；他伸出了一个指头
• A study on microclimate under poplar - crop intercropping systems
  农林间作系统林木遮荫及其对产量的影响
• Hardwood round timber - qualititative classification - part 2 : poplar
  硬圆木.质量分类.第2部分:白杨木
• Tall poplar trees stand on both sides of many roads in beijing
  在北京,很多马路的两旁都种着高大的杨树