那些停在腐肉上的绿头苍蝇是常见的丽蝇科昆虫。

The green ___blowflies on the rotting meat are common members of the Calliphoridae family.

兽医迅速清理了狗的伤口，以免绿头苍蝇在上面产卵。

The vet cleaned the dog's wound promptly to keep ___blowflies from laying eggs on it.