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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。
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。
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。
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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Step 5 - Observe the previous day's candlesticks on a 15 min chart.
第5步 - 观察前一天的烛台上的15分钟图表.
Caramelized Poached Apple, Vanilla Bean Ice Cream, Candied Macadamia Nut.
水煮焦糖苹果, 佐香草冰淇淋, 饰以糖衣碎核果.
Attempts have been made on me and my family by the cartels.
卡特家族已经威胁到我和我家庭.
Usage: The series equipments is production of polyester bottle - packing carbonates drink.
产品说明:用途: 本系列设备用于聚脂瓶含气饮料的生产.
One in six Cariocas is poor.
里约市民六分之一是穷人.
What if the kayak capsizes?
如果独木舟翻过来怎么办?
Cardiologists were more as likely as family practitioners to receive payments.
心内科医师收受支付的可能性是家庭医生的两倍多.
Most restaurants use capons to make dishes, as they are more delicious.
餐馆里都是用阉鸡做材料, 味道更鲜美.
A numerical method is presented for predicting the motion characteristics of high - speed displacement catamarans in waves.
给出一种基于 高速 细长体理论的预报排水型双体船在波浪上运动性能的数值方法.
The president asked the present cabinet to remain caretakers until the new cabinet is formed.
总统要求现任内阁成员继续留任直到下届内阁成立.
Catamarans will be transporting tourists from Hamburg from Hong Kong.
双体船将把游客从汉堡港运送过来.
I stared, trying to grasp the point of the picture and the captions.
我目不转睛地看着漫画, 想弄清楚漫画和解说词的意思.
She has two beautiful caskets.
她有两个漂亮的首饰盒.
You should also include some carnations to emphasize your underlying meaning. "
另外要配上石竹花来加重这涵意的力量. ”