灯心蜻蜓

例句：

1. 1. The dragonfly larvae live in the water and feed on plants.
   蜻蜓的幼虫生活在水里，以植物为食。
2. 2. The dragonfly larvae are an important food source for many aquatic animals.
   蜻蜓的幼虫是许多水生动物的重要食物来源。
3. 3. The dragonfly larvae are found in ponds and streams throughout the country.
   蜻蜓的幼虫遍布全国各地的池塘和溪流中。