【英语时差8,16】群居的剑齿猫

 Social Saber-Toothed Cats What’s more dangerous than meeting one saber toothed cat? Meeting a gang of them. The saber toothed cat, Smilodon fatalis, existed in North and South America until 10,000 years ago. It was lion sized, but with a heavier build and a short tail like a bobcat. Being one of the most preserved species at the La Brea Tar¹ Pits of Los Angeles, Smilodon is most famous for its seven inch long canine² teeth, but its behavior remains³ shrouded⁴ in mystery.Did it live alone or in groups? Some scientists suspect Smilodon was a social cat like the lion, coming to the tar pits to feed on animals trapped in the sticky goo. Of course, the big cats were often trapped too. Surprisingly, their fossils contained healed injuries and debilitating⁵ arthritis⁶. Was this a sign that old and wounded cats were supported by other group members? Scientists didn’t think so, but weren’t positively⁷ sure. So, scientists conducted a unique experiment, comparing the abundance of Smilodon fossils at the tar pits with the number of modern predators⁸ responding to playbacks in Africa. The playbacks were recordings⁹ of distressed¹⁰ prey¹¹ animals, mimicking¹² the conditions at the tar pits thousands of years ago. Playbacks attracted lions, hyenas¹³, and jackals, all social predators. Solitary¹⁴ predators were rare visitors. This was an unexpected finding, since there are fewer social predators than solitary ones in the African population. When they compared data, scientists were excited to find that the proportion of social predators attracted to the playbacks in Africa matched the proportion of Smilodon fossils found at the tar pits.This evidence suggested Smilodon lived in groups. It seems, meeting a saber toothed gang may have been the rule, not the exception.

 

1 tar   

n.柏油，焦油；vt.涂或浇柏油/焦油于

参考例句：

• The roof was covered with tar.屋顶涂抹了一层沥青。
• We use tar to make roads.我们用沥青铺路。

2 canine   

adj.犬的，犬科的

参考例句：

• The fox is a canine animal.狐狸是犬科动物。
• Herbivorous animals have very small canine teeth,or none.食草动物的犬牙很小或者没有。

3 remains   

n.剩余物，残留物；遗体，遗迹

参考例句：

• He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
• The remains of the meal were fed to the dog.残羹剩饭喂狗了。

4 shrouded   

v.隐瞒( shroud的过去式和过去分词 )；保密

参考例句：

• The hills were shrouded in mist . 这些小山被笼罩在薄雾之中。
• The towers were shrouded in mist. 城楼被蒙上薄雾。 来自《简明英汉词典》

5 debilitating   

a.使衰弱的

参考例句：

• The debilitating disease made him too weak to work. 这个令他衰弱的病，使他弱到没有办法工作。
• You may soon leave one debilitating condition or relationship forever. 你即将永远地和这段霉运说拜拜了。

6 arthritis   

n.关节炎

参考例句：

• Rheumatoid arthritis has also been linked with the virus.风湿性关节炎也与这种病毒有关。
• He spent three months in the hospital with acute rheumatic arthritis.他患急性风湿性关节炎，在医院住了三个月。

7 positively   

adv.明确地，断然，坚决地；实在，确实

参考例句：

• She was positively glowing with happiness.她满脸幸福。
• The weather was positively poisonous.这天气着实讨厌。

8 predators   

n.食肉动物( predator的名词复数 )；奴役他人者（尤指在财务或性关系方面）

参考例句：

• birds and their earthbound predators 鸟和地面上捕食它们的动物
• The eyes of predators are highly sensitive to the slightest movement. 捕食性动物的眼睛能感觉到最细小的动静。 来自《简明英汉词典》

9 recordings   

n.记录( recording的名词复数 )；录音；录像；唱片

参考例句：

• a boxed set of original recordings 一套盒装原声录音带
• old jazz recordings reissued on CD 以激光唱片重新发行的老爵士乐

10 distressed   

痛苦的

参考例句：

• He was too distressed and confused to answer their questions. 他非常苦恼而困惑，无法回答他们的问题。
• The news of his death distressed us greatly. 他逝世的消息使我们极为悲痛。

11 prey   

n.被掠食者，牺牲者，掠食；v.捕食，掠夺，折磨

参考例句：

• Stronger animals prey on weaker ones.弱肉强食。
• The lion was hunting for its prey.狮子在寻找猎物。

12 mimicking   

v.（尤指为了逗乐而）模仿( mimic的现在分词 )；酷似

参考例句：

• She's always mimicking the teachers. 她总喜欢模仿老师的言谈举止。
• The boy made us all laugh by mimicking the teacher's voice. 这男孩模仿老师的声音，逗得我们大家都笑了。 来自辞典例句

13 hyenas   

n.鬣狗( hyena的名词复数 )

参考例句：

• These animals were the prey of hyenas. 这些动物是鬣狗的猎物。 来自辞典例句
• We detest with horror the duplicity and villainy of the murderous hyenas of Bukharinite wreckers. 我们非常憎恨布哈林那帮两面三刀、杀人破坏，干尽坏事的豺狼。 来自辞典例句

14 solitary   

adj.孤独的，独立的，荒凉的；n.隐士

参考例句：

• I am rather fond of a solitary stroll in the country.我颇喜欢在乡间独自徜徉。
• The castle rises in solitary splendour on the fringe of the desert.这座城堡巍然耸立在沙漠的边际，显得十分壮美。