时间:2019-01-08 作者:英语课 分类:Scientific American(一)月


英语课

 People have used tobacco for well over a thousand years. And researchers recently found unique physical evidence of the ancient habit. They detected traces of tobacco in a 1300-year-old Mayan container. The work is in the journal Rapid Communications in Mass Spectrometry.


Based on hieroglyphics 1 and images of people smoking, archaeologists assumed that the Mayans used tobacco. In the hope of finding physical remains 2, the researchers examined the inside of a particular clay flask 3 dating back to the year 700 AD. Analysis of the flask revealed the presence of nicotine 4, as well as a few products of nicotine oxidation.
The chemical analysis owes some of its success to a dirty container—because the inside of the flask was not cleaned, the nicotine residue 5 remained uncontaminated. It also helped that the flask had a single purpose, and was not reused to hold multiple products. But the most important aid to this discovery was undoubtedly 6 some Mayan writing on the container. Which roughly translated means: container for tobacco.

n.pl.象形文字
  • Hieroglyphics are carved into the walls of the temple. 寺庙的墙壁上刻着象形文字。
  • His writing is so bad it just looks like hieroglyphics to me. 他写的糟透了,对我来说就像天书一样。
n.剩余物,残留物;遗体,遗迹
  • 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。
n.瓶,火药筒,砂箱
  • There is some deposit in the bottom of the flask.这只烧杯的底部有些沉淀物。
  • He took out a metal flask from a canvas bag.他从帆布包里拿出一个金属瓶子。
n.(化)尼古丁,烟碱
  • Many smokers who are chemically addicted to nicotine cannot cut down easily.许多有尼古丁瘾的抽烟人不容易把烟戒掉。
  • Many smokers who are chemically addicted to nicotine cannot cut down easily.许多有尼古丁瘾的抽烟人不容易把烟戒掉。
n.残余,剩余,残渣
  • Mary scraped the residue of food from the plates before putting them under water.玛丽在把盘子放入水之前先刮去上面的食物残渣。
  • Pesticide persistence beyond the critical period for control leads to residue problems.农药一旦超过控制的临界期,就会导致残留问题。
adv.确实地,无疑地
  • It is undoubtedly she who has said that.这话明明是她说的。
  • He is undoubtedly the pride of China.毫无疑问他是中国的骄傲。
标签: SSS 2012-01-17
学英语单词
absolute block number
ad colligenda
alkoxylates
allotee
artocrpesin
Aungbin
autecious
automatic calling equipment
back temperature
beam axis
billy button
Bogomolets' sera
buried river
chamberpots
charismatically
commr.
compound tubularacinous gland
coronoid process of ulna
cyano radical
Dawkinites
declaration of intention
dot-to-dot
electrophoretic light scattering
embowls
end-tighting blading
endonephritis
felrice
firing pressure
fixed up
flemish brick
frederik ix
frivolities
general-purpose operating system executive
goniometry
got up like a dog's dinner
hanniss
HVDC coupling system
hyperlip(a)emia
indenylidene
indium (electro)plating
interest adjustment scheme
Koh Sla
lightweight aggregate concrete
live load stress
long-answer
luminosity photometer
manipulators
Meeks Bay
mesmerists
Moore, Michael
morning peak
moyano
nanotoxicological
non-magnetic shim
nycticorax caledonicus manillensis
OASDI
of reputation
Oxalipratin
peel-garlic
Penedo
pensioned
political environments
pot-ware
power servo
recording oscillograph
redundant indexing
regranted
regression prediction equation
relief mechanism
representative section
resistance to axial compression
reversible voltage
rockbridgeite
rotationindicator
run-up of engine
Ruocid
Scarba
sidehilling
smoothable combinatorial manifold
sophistic thinking
spatial parameter variation
spectral distribution graph
spin vector
strivings
swallowed my pride
tartufite
tertiarybutylhydroquinone
Thysanosoma
tornado cellar
translation phase
transport manager subsystem
travase
uhceiform
un-negated
UNCTC
unsymmetrical flooding
water relationship
waveguide constant
werew
with a vengeance
yblessed
zone of intergration