The American Bald Eagle (2)

Did you know?
The bald eagle is one of America's largest birds of grey and has keen vision, spotting objects a mile away.
The birds mate for life and usually return to the same nest every year. Their nests, some of the world's largest, are often cone-shaped. In the spring, the female will lay one to three eggs. Then she and her male take turns warming the eggs and guarding the nest.
It is believed that at one time there were half a million eagles in North America. By 1963, though, their numbers had dropped to 417 nesting pairs in the lower 48 states. There were many causes, but the major reason was the use of the pesticide DDT. In 1972, the U.S. forbade the pesticide, and bald eagles now number around 9,800 nesting pairs.
While bald eagles are no longer endangered, there are still laws that provide protection for them. People everywhere hope this proud bird will fly free in the skies for many years to come.

Info Cloud
The American Bald Eagle白頭鷹
1.白頭鷹沒有禿頭，它的頭頂有白色羽毛，故稱之。
2.白頭鷹可以抓起同體重的獵物，帶回窩裡享用。
3.白頭鷹是傑出的工程師，它會花上幾年時間建造它的窩。有時因窩太重，讓樹枝承載不住而折斷，它會再重新建造另一個窩。因這種不屈不撓的精神，使它成為美國國鳥。  

Grammar Gym
it is believed that
- It is believed that at one time there were half a million eagles in North America.
- It is believed that this bakery was the first one to sell this special kind of cake.
- It is believed that the hero in the story came from this town.  

Language Lab
vision n.視力；願景、洞察力
- Janet's vision improved a lot after she began wearing eyeglasses. Janet自從開始戴眼鏡之後，視力進步很多。
- My dad has 20/20 vision.
我爸爸的視力是2.0/
- Hank is a man of vision.
Hank是一位有遠見的人

cone n.圓錐體、圓錐形
- The driver of the car that had broken down put cones on the road as a warming sign.
拋錨車的車主在馬路上放置圓錐筒，當做警告標誌。

forbid v.禁止  forbade/forbidden
- Tanya's parents forbade her to go out on weekdays because of her falling scores.
Tanya的父母禁止她週間外出，因為她的成績退步。
- The company forbids employees from making personal phone calls.
公司嚴禁員工打私人的電話

protection n.保護、警戒
protect v.保護
- The software provides good protection against most computer viruses. 這個軟體能夠有效的保護防禦大多數的電腦病毒