on average 托福

Bait with 40000 nematodes per plant killed 68.53%of black cutworm on average.

毒饵法（线虫剂量为40000条.株-1）防治小地老虎田间平均防治效果可达68.53％.

But India's tigerish economy,which has grown by 9% a year on average over the past three years, is itselfunder threat.

但是印度那虎虎有生济在前三年持平均每年9%率之后也面临同样处境。