As a child, commerce is simple: you give the ice cream man a handful of change, and you receive a Ninja Turtle popsicle with gumball eyes.

• 对小孩子来说，买卖是很简单的事情：你给卖棒冰的人一把零钱，然后你得到一根有口香糖眼的忍者神龟棒冰。