植物群系

森林：1.树木占优势的植被群系，其树冠相连，形成连续的树冠层。

pilot plant

Rheum rhaponticum L.;rhubarb(英);wine plant; pie plant(美)

immersion patenting plant (batch patenting plant)

lower plant

concentrate upgrading plant【矿】

threatened plant【植】

sewage plant

electroslag remelting plant (electroslag refining plant) heating by electric arc