Children's song: rolling hammer, a rolling, cross rolling, rolling, three ah, the three become five, five have become eight, to see who, variable frogs, quack, quack quack.

儿歌： 咕噜咕噜锤，咕噜咕噜一个，咕噜咕噜叉，咕噜咕噜，三啊，三变五，五变八，看看谁，变青蛙，呱呱，呱呱呱呱。

youdao

The cross-sections of tissue from frogs, newts, slime mold, cockroaches and other organic matter are beautiful, like works of the Abstract Expressionists with which they are contemporaneous.

WSJ: Roman Vishniac | Witness to Catastrophe | International Center of Photography | By William Meyers