Pteraspida

例句：

1. 1.The locusts are a common pest in the desert.
   蝗虫是沙漠中的常见害虫。
2. 2. The locusts were causing significant damage to crops.
   蝗虫对农作物造成了严重的损害。
3. 3. The scientists studied the behavior of locusts in their natural habitat.
   科学家们研究了蝗虫在自然栖息地的行为。