A new species of snake has been discovered on a remote island in the Bahamas.
在巴哈马群岛的一个偏僻小岛上发现了一种新的蛇类。
Scientists identified 20 of the one meter-long snakes during two trips to the Caribbean islands.
科学家们在前往加勒比岛的两次勘察中，都认出了20条这种一米长的蛇。
The second trip was made in October last year.
第二次勘察是在去年的十月。
One of the creatures made a dramatic appearance by moving on to the head of the team leader as he slept.
其中一条蛇出现的方式非常戏剧化：它在领队睡觉的时候爬到了他的头上。
The snake has been named silver boa because it is metallic colored and the first specimen found was climbing a silver palm tree.
这条蛇被命名为银蟒，因为它呈金属色，并且第一个被发现的标本当时正在爬一棵银色棕榈树。
The team was led by Dr. Graham Reynolds, from Harvard University,
这个团队由来自哈佛大学的格雷汉姆·雷诺带领，
the scientist confirmed the snake was a previously unknown species after conducting a genetic analysis of tissue samples.
这位科学家在对组织样品进行了一次基因分析后证实，这种蛇是之前所不为人知的一个种类。
Commenting on the find, snake expert Robert Henderson from the Museum of Natural History said:
来自自然历史博物馆的蛇类专家罗伯特·亨德森对这个发现评价说：
"Worldwide new species of frogs are being discovered and described quite regularly.
“在世界范围内，经常会现新种类的青蛙。
New species of snakes, however, are much rarer."
然而新种类的蛇则要稀有的多。”

Questions 5 to 7 are based on the news report you have just heard.
请根据你刚刚听到的新闻报道回答问题5至问题7。
Question 5. What is the news report mainly about?
问题5.这篇新闻的主要内容是什么？
Question 6. What do we learn about the scientific team leader?
问题6.关于这个科学团队的领队，我们获知了什么？
Question 7. How did the newly discovered creature get its name?
问题7. 这个最新发现的生物是如何得名的？