论文部分内容阅读
我们户外散步,或骑车慢行或坐在快速行驶的机动车上外出旅行,都会发现:太阳或月亮如影随行,你走她也走,你快她也快,你停她也停。她为什么这样,而不是相对于我们向后退呢?
When we go for a walk outdoors or go slow on a bicycle or sitting in a fast-moving motor vehicle, we will find that the sun or the moon is going with you. She walks when you walk. You are faster. She stops. Why is she doing this instead of retreating with respect to us?