时间:2019-01-20 作者:英语课 分类:2015年Scientific American(五)月


英语课

 Crop rotation 1 is a recognized way to keep soil and food eco-system healthy. Now scientists are saying that rotation could be a useful tool in the sea. Researchers tracked the shallow water near shore species used for food-sea cucumbers. They'are easy to harvest and are fairly valuable. But the same attributes mean they are easy to overharvest. The parctice has put some sea cucumber species at high risk of extinction 2, even in a relatively 3 well-managed area, the Great Barrier marine 4 part in Australia. In 2004, authorities split the Great Barrier Reef into 154 zones where each zone was fished only once every 3 years. Fishers rotate through the region. In computer models, the researchers ran through dozens of simulations of each zone both before and after the division took place. The trials revealed that even with an identical and low capture allowance in all cases, the sea cucumbers would recover more foily under rotation strategy than by harvesting simultaneously 5 throughout the region. In fact in trails that included rotations 6, the yield actually increased. The research is in the proceding of the national academic Of Sciences. The scientists say their results suggest that such rotation might be beneficial in these kinds of shallow marion regions around the world, particularly for species that are in high demand. Because you should not eat your seed corn or your seed sea cucumbers.



n.旋转;循环,轮流
  • Crop rotation helps prevent soil erosion.农作物轮作有助于防止水土流失。
  • The workers in this workshop do day and night shifts in weekly rotation.这个车间的工人上白班和上夜班每周轮换一次。
n.熄灭,消亡,消灭,灭绝,绝种
  • The plant is now in danger of extinction.这种植物现在有绝种的危险。
  • The island's way of life is doomed to extinction.这个岛上的生活方式注定要消失。
adv.比较...地,相对地
  • The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
  • The operation was relatively painless.手术相对来说不痛。
adj.海的;海生的;航海的;海事的;n.水兵
  • Marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。
  • When the war broke out,he volunteered for the Marine Corps.战争爆发时,他自愿参加了海军陆战队。
adv.同时发生地,同时进行地
  • The radar beam can track a number of targets almost simultaneously.雷达波几乎可以同时追着多个目标。
  • The Windows allow a computer user to execute multiple programs simultaneously.Windows允许计算机用户同时运行多个程序。
旋转( rotation的名词复数 ); 转动; 轮流; 轮换
  • Farmers traditionally used long-term rotations of hay, pasture, and corn. 农民以往长期实行干草、牧草和玉米轮作。
  • The crankshaft makes three rotations for each rotation of the rotor. 转子每转一周,曲轴转3周。
学英语单词
acid-releasing agent
aerodynamic brake
aim high
anticoagulat therapy
apron crib
arteria cervicalis superficialis
Aydat
Azerbajdzhan
bilirubin sulfate
bright green
car lamp
carbofos
carbonated water flooding
Cassius Clay
castlemont
catoptron
cepharandione
Chuniophoenix hainanensis
college japanese
concentration of element
customer profitability
cytopharynges
display characters per frame
drawability
drifting jumbo
dweebs
Eagle Village
elbryan
electric siren
electrothermal reduction
entomologises
evaluating indicator
faroff
federal reserves
fiscal court
flocked pile
gallopin
gas storage heater
genus Hexanchus
give reasons for
hand brake band anchor bracket
hardbacks
highway signals fuzes
infinite electrode
interfolding
jig back
Lemnians
MD DATA
mental attribute
mesomorphus villiger
message type writer
Minamichita
mine sweeping light
minimal brain damage
multispeaker
mutilple output switching function
Mytilini
National Labor Relations Board
noise photoelectron
non-Newtonian character
normal luminous intensity of LED
opportunistic fungus
outweeps
oxisols
pay off
phantom bottom
phasing contact
Phytophlyctodermatitis
pile driving analyzer
polerovirus beet western yellows virus
pollinic, pollinical
popliteal space
Postadenoidectomy
projected profile
quintuple-clicked
racking strain
romanizes
sample extreme
sex-for-sale
ship hull
slot inserter
songcatcher
spectral narrowing
spend time doing
statistics of circulation
stick test
structure length
Swedish masseuse
terminal oxidase
tetra-acetic
to command
transistor voltage stabilizer
tree planter
trifolds
two all
Tylophora arenicola
Ulvenhout
visceralis laminae
vocab
wendie
wildlife-conservations
wirecutters