【英语时差8,16】巨大的声响

Ya?l: On today's Moment of Science: The praying mantis¹, an auditory Cyclops.

D: Sounds like a B-Movie from the 1950's!

Y: To small insects, praying mantids probably do seem like something out of a monster      movie. Mantids are some of the most impressive insect predators², regularly snaring³      other insects or even the occasional lizard⁴, snake or frog.

     But despite their hunting skills, mantids are ill-equipped to avoid predation      themselves. Camouflage⁵ keeps some well hidden from visual hunters such as birds,      but matching the color of your background won't hide you from nocturnal predators,      like bats. Many bats locate their prey⁶ in total darkness by echolocation---producing      ultra-high pitched calls and listening to the reflections, or echoes off objects in their      environment.

D: I thought this show was about the praying mantis?

Y: Right. Praying mantids were long thought to be deaf, but neuroscientists at Cornell      and the University of Maryland discovered a single teardrop-shaped ear along the      middle of praying mantis' thorax. Praying mantids don't produce sounds, and don't      use sound to locate their prey, so why would they need to hear?

D: Bats?

Y: Bats. The researchers tested whether the mantids' unique ear could hear the      ultrasonic⁷ cries of bats, which are too high pitched for human ears to detect. When      the scientists played recordings⁸ of bat echolocation calls to free-flying mantids, the      mantids abruptly⁹ stalled in the air and erratically¹⁰ spiraled downward, dropping out of      the sky. The evasive maneuvers¹¹ enable a normally slow-flying mantids to escape bat      attacks in nearly eighty-percent of trials. When scientists deafened¹² the mantids, they      only escaped bat attacks thirty-four percent of the time. So ultrasonic hearing gives      mantids a huge advantage.

D: And the one-eared mantis lives to hunt another day!  

1 mantis   

n.螳螂

参考例句：

• Praying mantis has two powerful claws like sharp knives.螳螂有一对强壮的爪子，它们像锋利的刀。
• In her mind,it was a female mantis,devouring her mates.她的意识中，是一只雌螳螂正吞咽她的配偶。

2 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》

3 snaring   

v.用罗网捕捉，诱陷，陷害( snare的现在分词 )

参考例句：

• They have the ability to perform mucosal biopsies, cautery and even snaring polyps. 他们能够学习肠粘膜活检、烧灼、甚至肠息肉套扎术。 来自互联网

4 lizard   

n.蜥蜴，壁虎

参考例句：

• A chameleon is a kind of lizard.变色龙是一种蜥蜴。
• The lizard darted out its tongue at the insect.蜥蜴伸出舌头去吃小昆虫。

5 camouflage   

n./v.掩饰，伪装

参考例句：

• The white fur of the polar bear is a natural camouflage.北极熊身上的白色的浓密软毛是一种天然的伪装。
• The animal's markings provide effective camouflage.这种动物身上的斑纹是很有效的伪装。

6 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。

7 ultrasonic   

adj.超声的；n.超声波

参考例句：

• It was very necessary for people to take type-B ultrasonic inspection regularly.定期进行B超检查是十分必要的。
• Sounds are classified into two kinds: sonic and ultrasonic.声波分为两类，即普通声波与超声波。

8 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

9 abruptly   

adv.突然地，出其不意地

参考例句：

• He gestured abruptly for Virginia to get in the car.他粗鲁地示意弗吉尼亚上车。
• I was abruptly notified that a half-hour speech was expected of me.我突然被通知要讲半个小时的话。

10 erratically   

adv.不规律地，不定地

参考例句：

• Police stopped him for driving erratically. 警察因其驾驶不循规则而把他拦下了。 来自辞典例句
• Magnetitite-bearing plugs are found erratically from the base of the Critical Zone. 含磁铁岩的岩栓不规则地分布于关键带的基底以上。 来自辞典例句

11 maneuvers   

n.策略，谋略，花招( maneuver的名词复数 )

参考例句：

• He suspected at once that she had been spying upon his maneuvers. 他立刻猜想到，她已经侦察到他的行动。 来自辞典例句
• Maneuvers in Guizhou occupied the Reds for four months. 贵州境内的作战占了红军四个月的时间。 来自辞典例句

12 deafened   

使聋( deafen的过去式和过去分词 )； 使隔音

参考例句：

• A hard blow on the ear deafened him for life. 耳朵上挨的一记猛击使他耳聋了一辈子。
• The noise deafened us. 嘈杂声把我们吵聋了。