《明史·志·卷六十》
旧口都是积沙，人力虽不可疏通，水力自能冲刷，海口无可疏通之理。
旧口皆系积沙，人力虽不可浚，水力自能冲刷，海无可浚之理。
The old mouth is full of sand, although人力 can not be dredged, the water force can naturally scour, the mouth of the sea can not be dredged reason.