rootstock [ru:ts'tɒk]

例句:

• Rootstock breeding programs are receiving major emphasis in England, the USSR . and in Poland.
  砧木育种计划在英 、 苏、波、均作为重点项目.
  
• Obviously both rootstock and cultivar will have a pronounced bearing on tree size at maturity.
  很明显,砧木或栽培品种都能对成龄植株的树形大小发生深刻的影响.
  
• The scion is then securely placed into a cut on the rootstock.
  然后将接穗插入砧木切口紧密贴合.
  
• Just make sure they are on the dwarfing rootstock 'Flying Dragon'.
  来自BBC