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周期性的局部地区的灾变降低了种群的数量.用英语怎么说？

周期性的局部地区的灾变降低了种群的数量.

Periodic local catastrophes reduce populations.

相关词汇
periodic local catastrophes reduce populations

periodic

adj. 周期的，定期的，回归的，间歇的，时而发生的；

local

adj. 地方的，当地的，本地的，局部的，褊狭的；n. 慢车，本地居民（律师、教士、医生），住处附近的当地酒店，本地新闻；

catastrophes

n. 灾祸( catastrophe的名词复数 )，灾难，不幸事件，困难；

reduce

vt. 减少，缩小，使还原，使变弱；vi. 减少，节食，蒸发，（液体）浓缩变稠；

populations

n. 人口( population的名词复数 )，全体居民，特定人[动物]群；
热门例句
He acknowledged publicly that he might have made a mistake.
他当众承认自己可能犯了个错误。
...the spiralling vortex airflow that slows the plane.
使飞机减速的螺旋形气流涡旋
You just go on ahead. I'll come by later...
你只管先往前走。我随后就来。
He who spares his rod hates his son, But he who loves him chastens him early.
24不忍用杖打儿子的,是恨恶他;疼爱儿子的, 趁早管教.
For further information, please contact 414 3925, extension 2253.
详情请致电414 3925,转分机2253。
He sat there while I made the case for his dismissal...
他坐在那儿，听我陈述解雇他的理由。
Baroness Thatcher's claims seem credible to many.
撒切尔女男爵的主张在很多人看来是可信的。
Nothing to be got without pains but poverty.
一份耕耘，一份收获。
This decree obliges unions to delay strikes.
该法令迫使工会推迟罢工。
The right to demand payment from the endorser of a commercial paper when the first party liable fails to pay.
追索权当有支付义务的第一方不能支付时，可以向商业票据的背书人要求支付的权力。
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Our sweaters and cardigans have a full range of specifications and sizes.
我们店的各类羊毛衫尺寸齐全.
Build dizzy carousels, unbelievable roller - coasters, Ferris wheels, fear halls and other thrilling andand thirsty.
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The Swiss deposits contain evidence of such catastrophes.
瑞士的遗址里还有这种灾难的证据.
Some people become cardiologists and care for the heart.
一些人成为心血管专家护理心脏.
He models cardigans in knitting books.
他在编织杂志上做羊毛衫模特.
An alphanumeric term that identifies a data set a statement a program, or a cataloged procedure.
一种字母数字项,用于标识某个数据集、语句 、 程序或已编目的过程.
That night there were a thousand campfires.
晚上点起上千堆营火.
Support rows of beans with criss-crossed canes.
用交错的小竹竿架起一排排的豆荚。
The divers were capsuled in a submarine.
潜水者们被包覆在潜艇里.
The design calculation of heat exchanging system in carbonizing tower are introduced.
着重介绍了碳化塔换热系统的设计计算.
The cotton candy looked but the caramels looked even better.
棉花糖看起来很吸引人,但是焦糖看起来更好吃.
The rain pattered against the casements; the bells tolled for church with a melancholy sound.
雨点噼噼啪啪地打在窗子上; 教堂里传来沉重的钟声,召唤人们去做礼拜.
They canoed across the river.
他们划着小舟过河.