《明史·志·卷六十三》
然而，从德州往下逐渐与海接近，地低河窄容易被冲垮河堤。
然自德州下渐与海近，卑窄易冲溃。
However, from the state of De downwards it gradually gets closer to the sea, and the low-lying land and narrow river are vulnerable to the river embankments being washed away.