英语语法分析

The 1980 volcanic eruption of Mount Saint Helens, for example, sent mud and debris into several tributaries of the Columbia River.

例如，1980年圣海伦斯火山爆发，导致哥伦比亚河的几条支流产生泥石流现象。

According to the law, fishing will not be allowed in all of the Yangtze's natural waterways, including its major tributaries and lakes.

根据法律，长江的所有天然水道，包括主要支流和湖泊都不允许捕鱼。

Fossa ovalis and the tributaries of great saphenous veins were observed and measured on 52 lower limbs of the patient.

在患者的52个下肢上观察并测量了卵圆窝和大隐静脉的支流。