而这，亲爱的老弟，正是那样做的目的。

And that my dear boy is the whole point of the exercise.

youdao

目的是为了让农民精确地确定喷洒杀虫剂的地方而无需把整块地都撒上药，因为那样做毫无疑问要殃及没染上害虫的植物。

The goal was to let farmers precisely target pesticide spraying rather than rain poison on a whole field, which invariably includes plants that don't have pest problems.

youdao

目的是为了让农民精确地确定喷洒杀虫剂的地方而无需把整块地都撒上药，因为那样做毫无疑问要殃及没染上害虫的植物。

The goal was to let farmers precisely target pesticide spraying rather than rain poison on a whole field, which invariably includes plants that don't have pest problems.

youdao