perennial rye-grass

• 多年生黑麦草

perennial rye-grass的用法和样例：

例句

1. Perennial ryegrass throws a lot of autumn growth.
   多年生黑麦草在秋季长势很好。
2. Ammonia volatilization was estimated in the field from perennial ryegrass turf after application of five kinds of N-fertilizer.
   在多年生黑麦草草坪施用速效与缓效氮肥后，对氨的挥发损失进行田间定位测定。