VOA慢速英语:The Potomac River Flows Through Cities, History

短语讲解：

1. Today we tell about the Potomac River.

tell about 告诉（某人）有关…的情况，谈及；讲述
例句：What would he tell about now?
他现在会说些什么？

2. It flows more than 600 kilometers, from the Allegheny Mountains to the Chesapeake Bay and finally into the Atlantic Ocean.

more than 不止
例句：We have more than a car!
我们可不止有辆车！

3. In 1859, the United States was close to civil war between the northern and southern states.

close to 离…近；与…关系密切；近乎；临近
例句：He was standing close to the door.
他靠近门站着。

4. Today the park welcomes visitors who come to learn about life along the Potomac River.

learn about 获得，学得；得知有关…的消息
例句：You'd learn about the pressure in a plane.
您会学到飞机中的气压。

5. Today it no longer carries goods.

no longer 不再
例句：These criticisms are no longer warranted.
这些批评不再合理。

6. The Potomac faces many environmental problems as a result of population growth and its resulting pressures on land and water resources.

as a result of 由于…的结果
例句：I was late as a result of the snow.
由于下雪，我来晚了。

7. It carries out a land protection program, develops land and water restoration projects, and provides education programs for adults and young people.

carry out 执行；进行
例句：The onus is on them to carry out immediate reviews.
它们有义务立即重新对此进行评估。

8. We hope that Americans will always take care of their historic Potomac River.

take care of 照顾
例句：So take care of yourself.
那你好好照顾自己.