black fly

例句：

1. 1.The black fly population has been increasing rapidly in recent years.
   近年来，黑蝇的种群迅速增加。
2. 2.The black fly bites can cause severe itching and swelling.
   黑蝇叮咬会导致严重的瘙痒和肿胀。
3. 3.The black fly is a common vector for the transmission of diseases.
   黑蝇是疾病传播的常见媒介。