water strider

例句：

1. 1.The water striders were swimming in the pond.
   水步行者们正在池塘里游泳。
2. 2.The frogs are a common sight in the park during the summer.
   青蛙是公园夏天常见的景象。
3. 3. Toads often emerge from their burrows in search of food.
   蟾蜍经常从它们的巢穴中出来寻找食物。