时间:2019-01-22 作者:英语课 分类:自然百科2009年


英语课

 Miners in South Africa have found a white diamond about the size of a chicken egg. The diamond may be among the world's top 20 high-quality gems 2. It was discovered at the Cullinan mine, northeast of Pretoria.


 
Petra Diamonds Limited chief executive says the 507.55-carat gem 1 was of exceptional color and clarity. No official value has been given for the diamond, but the company’s Finance Director is quoted as saying it could be worth 20-million dollars. It weighs just over 100 grams.
 
The mine also produced the largest diamond ever found, the Cullinan, at 3,106 carats in the rough. That rough stone was cut into 9 large and 100 small finished stones. The largest of these is set in Britain’s Royal Scepter, which is part of the Crown Jewels.

n.宝石,珠宝;受爱戴的人 [同]jewel
  • The gem is beyond my pocket.这颗宝石我可买不起。
  • The little gem is worth two thousand dollars.这块小宝石价值两千美元。
growth; economy; management; and customer satisfaction 增长
  • a crown studded with gems 镶有宝石的皇冠
  • The apt citations and poetic gems have adorned his speeches. 贴切的引语和珠玑般的诗句为他的演说词增添文采。
学英语单词
area gap
aschoff's cell
asymptotic normal distribution
bandar fisheri formosae
beach buggy
calorescence
cassini
casting-out-nines check
certificate of quality
charge cards
check - in counter
chlorbenzoxamine
chortle over
common grape hyacinths
cycloidal propeller
denude
distance cathode
distortion measuring equipment
double-stage turbine
dreadlocking
ecclesiastry
electroneuromyograms
entremet
erythrodysesthesias
experiment site for aerial photography
extraocular
film distillation apparatus
firesets
flow metering device
flowering peach
fluidized calcination
fluorosulfite
gibbet
graded time lag relay
grain size rule
habaneros
hakel
harmonic balance method
heart function
Hot Coffee
hypercautious
hyperemphasis
hyperplastic goiter
hypogastric pain in pregnancy
inground
intermediated hybrid
jacket side
joint cutter
Kinderhookian
lysosome stabilizer
megalobatrachus japonicus
mephenesin carbamate
meta-tolyl-n-methylcarbamate
milkboxes
misfolding
MOA memorandum of agreement
Mount Bethel
multimale
multiplication theorem
multistage adiabatic reaction process
neast
nonrepeatability
normalized intensity
nutmeg butter
Oggenhausen
pacambocythere tzuchianga
Pareto index
passive trade balance
peacock mite
pentagamma function
photoperiods
plain external grinding machine
pos-
Prackenbach
regenerative crypts
revolution paraboloid
ringing time
rutiluss rutiluss
safe-havens
sakaguchis
separate from
sfcc
shalloons
shinobu
shiso oil
shotgun sequencing
skeet skeets
slim blade suture needle
spoked wheel
square cross-section
streamertails
subclumps
subsurface land roller
take it out in
the fool of fate
tiered silhouette
training needs
transfructosylates
trusswork
universal parts
vanillate
zippoes