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1·Brown plant hopper distributes very wide, and it has been the major rice insects in Southern China.

褐飞虱在中国分布很广，近年来已成为南方稻区的主要害虫。

2·Recovery velocity of root absorption correlated with brown paddy plant hopper density and bite days.

根系的恢复速度与褐飞虱密度和为害天数有关。

3·It has the characteristics of high yield, strong resistance to blast and brown plant hopper, acceptable grain quality, high seed production yield potential and wide adaptability.

该组合具有产量高、抗稻瘟病和褐飞虱、米质较优、制种易获高产等特点。

4·It is studied that the seismic properties of suspending coal hopper structure with lead dampers in thermal power plant.

对设置铅阻尼器的火电厂悬吊煤斗结构的耗能减震性能进行了研究。