constructive species造句

• Carbon content rate in constructive species of main forest types in northern china
  华北主要森林类型建群种的含碳率分析
• The community composed of elaeagnus mollis as the constructive species is one of the typical vegetation types in the hills and lower - mountains of southern of shanxi
  以翅果油树为建群种形成的群落，是山西南部暖温带落叶阔叶林地带低山丘陵区的代表植被类型之一。