时间:2018-12-24 作者:英语课 分类:Scientific American(十一)月


英语课

 This is Scientific American sixty seconds science. I am Karen Hopkin. This will take just a minute. 


 
Your morning coffee. A baking pie. That turkey in the oven. There are some smells you just can’t get enough of. But mix them and other scents 2 all together and you get, well, nothing much.
 
According to a new study, a mash-up of 20 or 30 different odors gives you something entirely 3 nondescript: almost a non-smell, if you will. The finding appears in the Proceedings 4 of the National Academy of Sciences. 
 
If you’ve ever taken physics, you might remember that combining colors of many different wavelengths 5 generates light that’s white. And blending sounds of many different frequencies produces white noise.
 
Well, researchers got to wondering whether there’s an equivalent phenomenon for olfaction: call it ‘white smell.’ So they whipped up various combinations of 80 distinct chemicals and had volunteers take a whiff. When the olfactory 6 ingredient list topped 30, one cocktail 7 smelled pretty much the same as any other, even when the mixtures didn’t have a single ingredient in common.
 
The scent 1 was not unpleasant. A professional perfumer called it “aromatic,” which is like saying that the light was, well, light. So enjoy the smells of the holiday season. But try not to sniff 8 too many at once.
 
Thanks for the minute for scientific American sixty seconds science. I am Karen Hopkin.

1 scent
n.气味,香味,香水,线索,嗅觉;v.嗅,发觉
  • The air was filled with the scent of lilac.空气中弥漫着丁香花的芬芳。
  • The flowers give off a heady scent at night.这些花晚上散发出醉人的芳香。
2 scents
n.香水( scent的名词复数 );气味;(动物的)臭迹;(尤指狗的)嗅觉
  • The air was fragrant with scents from the sea and the hills. 空气中荡漾着山和海的芬芳气息。
  • The winds came down with scents of the grass and wild flowers. 微风送来阵阵青草和野花的香气。 来自《简明英汉词典》
3 entirely
ad.全部地,完整地;完全地,彻底地
  • The fire was entirely caused by their neglect of duty. 那场火灾完全是由于他们失职而引起的。
  • His life was entirely given up to the educational work. 他的一生统统献给了教育工作。
4 proceedings
n.进程,过程,议程;诉讼(程序);公报
  • He was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
5 wavelengths
n.波长( wavelength的名词复数 );具有相同的/不同的思路;合拍;不合拍
  • I find him difficult to talk to—we're on completely different wavelengths. 我没法和他谈话,因为我们俩完全不对路。 来自《简明英汉词典》
  • Sunlight consists of different wavelengths of radiation. 阳光由几种不同波长的射线组成。 来自辞典例句
6 olfactory
adj.嗅觉的
  • He is to develop a sensor to substitute for the olfactory abilities of dogs.克罗克将研制一种传感器用以代替狗的嗅觉功能。
  • Based on these findings, Keller suspects that each person has an olfactory blind spot.根据这些发现,凯勒推断,每个人都有一个嗅觉盲区。
7 cocktail
n.鸡尾酒;餐前开胃小吃;混合物
  • We invited some foreign friends for a cocktail party.我们邀请了一些外国朋友参加鸡尾酒会。
  • At a cocktail party in Hollywood,I was introduced to Charlie Chaplin.在好莱坞的一次鸡尾酒会上,人家把我介绍给查理·卓别林。
8 sniff
vi.嗅…味道;抽鼻涕;对嗤之以鼻,蔑视
  • The police used dogs to sniff out the criminals in their hiding - place.警察使用警犬查出了罪犯的藏身地点。
  • When Munchie meets a dog on the beach, they sniff each other for a while.当麦奇在海滩上碰到另一条狗的时候,他们会彼此嗅一会儿。
学英语单词
a load of old cobblers
abductees
adnexorganogenic
airborne pollution
amynthas shinanmontis
analysis of combustible gases
angle blade scraper
antithesis and thesis
assumed debt
Bessé-sur-Braye
better nor like
blow table
bold relief
bourette yarn
browzes
burst extended-data-out RAM
canvas top
chaves
chimney flue
choedron
common management information and services protocol over tcp
contribution analysis
coostochondrosarcoma
cordometer
core hardness tester
criminal network
date commenced
deinterleaving
dicyclopentadienyl iron
dielectric radiator
dipsotherapy
direct-axis voltage
discrepute
ditfurth
double acting press
e signature bill
elimination game
entangial
fault coal basin
fibrous matter
Frilly dress
fuckweasels
groin gravy
hardware interpreter
haskel
helsingforss
hot phenol method
hypogonadisms
in-voluntary
infectious polyneuroradiculitis
integrated optics
iron pipe thread
lattice septum
license lamp
lignicolous
lunar variation
mass excess
mexican waltz
mileage chart
moon bounces
music recognition
Nazarene
NEMIPTERIDAE
nouther
number of ships
orthozirconate
Outer Dowsing Channel
over-whelming
phase multiplier
proactive fiscal policy
professional equipment
protozoan ecology
psycharalysis
psychopolitical
punching breaking length
pythium hydnosporum
rainbow runners
ready-to-drink
receiving-end impedance
representation and storage of image
reversal of stress
Rolandic
rubus lambertianus ser.
Sakishima Islands
schoenfliesite
single boom system
slow-scan sync detection
Tel'novskiy
thermal process protection
thermal treatment equipment
throught the year
Tiola
title domain
twenty to seven
under deck clause
unyoung
upper sieve
varicella keratitis
wardeine
washing out loss
wheedle sth from of sb
xenolepidichthys dalgleishi