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美国科学60秒 SSS 2015-05-01

时间:2015-06-08 06:18:34

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(单词翻译)

 This is scientific American ,60 second science. I’m Chris D..ta. Got a minute? 

In less you have a pair of noise-cancel headphones. Flying can be annoying to the ears. A lot of low-pitch rumbling1 makes it into the cabin. The problem is ,the wings ,floors, ceilings ,and bolcats, are lined with the lightly material with a honey cone2 structure, which adds to the structural3 integrity to the aircraft. But engine and airflow sound cuts right through. “The physical law says that the lighter4 the material is the worse it could block the sound.” UN? Jane is an acoustician in north Caroline University. In a quest for quiet, he and his colleagues constructed a similar material. But with a quarter mille-meter of thin latex, stretch across the cells of the honey cone. In test, the latext layer structure cut the intensity5 of low frequency rumbling to a thousand of its previous level. “enough” He says, ”to make an airplane cabin sound more like a peaceful living room. The study in the journal applied6 physics letters. Problem is the material Gin develops is six percent heavier than the standard stuff. And more weight means more fuel, means more expense. But if we settle for a little slightly quieter flight, Gin says could use less lay text. Making  the noise barking honey cone just a few percent heavier. Considering the honey cones7 are one of the lightest part of the airplane, you then looking at a modest plane weight gain. Of course, Let’s assume everyone wants a quieter plane. “Some people say that they actually want to hear the sound of engine. They don’t want that the cabin is too quiet. They want to make sure that the plane is flying. ” Sounds like  ? expensive  headphones a little while ?

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1 rumbling 85a55a2bf439684a14a81139f0b36eb1     
n. 隆隆声, 辘辘声 adj. 隆隆响的 动词rumble的现在分词
参考例句:
  • The earthquake began with a deep [low] rumbling sound. 地震开始时发出低沉的隆隆声。
  • The crane made rumbling sound. 吊车发出隆隆的响声。
2 cone lYJyi     
n.圆锥体,圆锥形东西,球果
参考例句:
  • Saw-dust piled up in a great cone.锯屑堆积如山。
  • The police have sectioned off part of the road with traffic cone.警察用锥形路标把部分路面分隔开来。
3 structural itXw5     
adj.构造的,组织的,建筑(用)的
参考例句:
  • The storm caused no structural damage.风暴没有造成建筑结构方面的破坏。
  • The North American continent is made up of three great structural entities.北美大陆是由三个构造单元组成的。
4 lighter 5pPzPR     
n.打火机,点火器;驳船;v.用驳船运送;light的比较级
参考例句:
  • The portrait was touched up so as to make it lighter.这张画经过润色,色调明朗了一些。
  • The lighter works off the car battery.引燃器利用汽车蓄电池打火。
5 intensity 45Ixd     
n.强烈,剧烈;强度;烈度
参考例句:
  • I didn't realize the intensity of people's feelings on this issue.我没有意识到这一问题能引起群情激奋。
  • The strike is growing in intensity.罢工日益加剧。
6 applied Tz2zXA     
adj.应用的;v.应用,适用
参考例句:
  • She plans to take a course in applied linguistics.她打算学习应用语言学课程。
  • This cream is best applied to the face at night.这种乳霜最好晚上擦脸用。
7 cones 1928ec03844308f65ae62221b11e81e3     
n.(人眼)圆锥细胞;圆锥体( cone的名词复数 );球果;圆锥形东西;(盛冰淇淋的)锥形蛋卷筒
参考例句:
  • In the pines squirrels commonly chew off and drop entire cones. 松树上的松鼠通常咬掉和弄落整个球果。 来自辞典例句
  • Many children would rather eat ice cream from cones than from dishes. 许多小孩喜欢吃蛋卷冰淇淋胜过盘装冰淇淋。 来自辞典例句

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