"Ball" exchange, 不雅，請慎入！

這是俺滴頭兒講的，已重複了N遍，仍樂此不疲。大意是：某叫獸突發奇想，要改造老齡老鼠，讓它們再度煥發青春。此改造簡單地說就是換“蛋”。"We take out young balls and put into an old mouse. The old becomes young. We take out old balls and put into a young mouse. The young becomes old."

於是，俺們動不動就聽見“...... old balls becomes old, ...... young balls becomes young ......”。