The head of a string of pigs appeared, snout-up, over the ditch, and he had to screech to a stop and watch the rear of the last pig disappear shaking into the ditch on the other side.

这时候出现了一群猪，仰着鼻子走过水渠，他只好用一个急刹车,目送着最后一只猪大摇大摆地跨过水沟,消失在另一端。

耶鲁公开课 - 1945年后的美国小说课程节选

S We saw percent S which is a placeholder for a string, turns out as you'll see over time there are other placeholders.

我们知道字符串占位符，输出来就是另一番场景了,还有一些其他类型的占位符。

哈佛公开课 - 计算机科学课程节选