perennial grass是什么意思 perennial grass怎么读
perennial grass的用法和样例
- Perennial grass having stems 3 to 4 feet high,used especially in Africa and India for pasture and hay.
多年生草，茎高到米，用作牧草和干草，特别在非洲和印度。 - Perennial South African grass having densely clumped flimsy stems,introduced into United States especially for erosion control.
南非多年生草，有密集簇生的茎，引入美国主要用于防腐。 - Potassium manuring may be less critical in continuous grass farming than in ley farming.
在多年生牧草地施用钾肥的迫切性比短期草地要小些。 - Permanent grass has a number of advantages over clean cultivation, the system it superseded.
多年生牧草较之已被其取代的清耕有许多优越性。
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