alfalfa caterpillar

例句：

1. 1. The alfalfa plants are thriving in the garden.
   苜蓿植物在花园里茁壮成长。
2. 2. The alfalfa moth is a common pest in the field.
   苜蓿蛾是田野中的常见害虫。
3. 3. The alfalfa caterpillars feed on the leaves of the plant.
   苜蓿蛾以植物的叶子为食。