Dr Hill herself spent years trying to work out how prairie mole crickets, a highly territorial species of burrowing insect, manage to space themselves out underground.

希尔博士本人用了数年的时间，希望搞明白牧场蟋蟀这种领地特征明显的穴居昆虫是如何在地下划分领地的。

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But it was not effective to kill mole crickets and grubs.

本株菌对蝼蛄和蛴螬两种地下害虫都没表现出杀虫效果。

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But it was not effective to kill mole crickets and grubs.

本株菌对蝼蛄和蛴螬两种地下害虫都没表现出杀虫效果。

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