被引进的物种在刚被引入之后往往会发生数量暴增。
Introduced species can often undergo a population boom just after introduction.
二刺齿蓟马的发生数量与苜蓿的生育期密切相关。
The population dynamics of O. confuses and the incidence of reproductive age alfalfa closely related.
麦二叉蚜只在夏茬燕麦叶部上发现，发生数量不大。
Sch. graminum Ronda's number was very little, only was found on summer stubble oat.
有很多的城市是典型的例子，那些城市大幅度增加自行车的使用使得自行车事故的发生数量减少。
There are a number of examples of cities, where a substantial increase in bicycle use has been associated with a decrease in the number of cycling accidents.
例如，在波丘派恩河的海底平原，来自海面的有机物质的数量随着年份的增加而发生数量级的变化。
For example, at the Porcupine Abyssal Plain, the amount of organic material sinking from above can vary by almost an order of magnitude from one year to another.
方法：在枸杞生长季节调查枸杞害虫及其天敌种类，定期、定点调查害虫及天敌发生数量。
Method: the kinds and number of pests and their natural enemies were investigated at regular intervals and on the fixed trees.
方法：在枸杞生长季节调查枸杞害虫及其天敌种类，定期、定点调查害虫及天敌发生数量。
Methods:The kinds and number of the pests and its natural enemies were investigated at fixed plants.
对我国道路建设及维修养护情况进行了调查和分析，估算了我国每年的废旧沥青混合料发生数量。
The road construction and maintenance in China was investigated and analyzed, then the amount of waste asphalt mixture occurred every year in China was estimated.
我们的研究结果显示使用活动负载假体能够较固定负载假体并不能显著降低假体周围透光线和并发症的发生数量。
Our results show that the use of mobile-bearing prostheses instead of fixed-bearing prostheses reduced the risk of radiolucent lines and of complications by statistically insignificant amounts.
前茬作物、播种方式、耕作制度和气候条件等都通过影响玉米的播期或灰飞虱的发生数量来间接影响当地或当年病害发生的轻重。
The others such as previous crops, sowing way for maize, cropping system and the climate were indirect factors, which affected the sowing date or amount of planthopper.
极端降水：在北半球，由于气候条件的改变，增加了极端降水事件的发生数量，比如在英国，爆发洪水的可能性较2000年增加了两倍。
Extreme precipitation: Climate change is increasing the number of extreme precipitation events across the Northern Hemisphere — as well as doubling the risk of floods like the one in the U.K. in 2000.
这一数字也提供了一种便捷的方法来比较飓风和地震等其他自然灾难所造成的损失程度——也是一种仅仅通过统计事故发生数量所不能达到的方法。
They also provide a convenient way of comparing apples with oranges-the relative damage inflicted by cyclones versus earthquakes, etc.-in a way that simply counting the number of incidents can't.
这一数字也提供了一种便捷的方法来比较飓风和地震等其他自然灾难所造成的损失程度——也是一种仅仅通过统计事故发生数量所不能达到的方法。
They also provide a convenient way of comparing apples with oranges-the relative damage inflicted by cyclones versus earthquakes, etc. -in a way that simply counting the number of incidents can't.
当这种情况发生时，猎物的数量就会反弹。
例如，当猴群发现它们的数量不占优势时，它们会避免与其他群体发生冲突。
For example, a monkey group will avoid fights with other groups when they find their number is not an advantage.
与新出现和重现传染病相关的流行病目前正以历史上前所未有的数量发生。
Epidemics associated with emerging and re-emerging infectious diseases are now occurring in historically unprecedented Numbers.
几个世纪以来，人们使用家具的种类和数量都发生了根本的改变。
Over the centuries, the amount and the kinds of furniture people use have changed radically.
有证据证明太阳活动不足会增加其发生的数量，而目前太阳正处于最低活动期。
There is evidence that low solar activity increases their numbers , and the sun is currently in a period of minimum activity.
当预取数量发生变化时。
美国食品药物管理局（FDA)引用了独立国家癌症研究所的一项方案成果，尽管使用手机的使用量急剧上升，1987年至2005年间，脑癌发生的数量并没有增加。
FDA also cites a separate National Cancer Institute program finding that, despite the dramatic increase in cell phone use, occurrences of brain cancer did not increase between 1987 and 2005.
目的是要识别为什么类似退货会发生并尽力降低类似退货数量。
The goal is to identify why these types of returns are happening and work to reduce their volume.
他们研究了半个世纪以来世界上所有的渔场，其研究方法并不是为了试图估算特定区域的海洋中实际生物总数（活着生物的总数），而是研究单位面积中海洋生物数量发生的变化。
Their methods de not attempt to estimate the actual biomass (the amount of living biological matter) of fish species in particular parts of the ocean, but rather changes in that biomass over time.
积极进行天然气钻探的钻井数量也几乎未发生变化。
The number of drill rigs actively drilling for gas has barely budged, though it has been down in the US three of the last four weeks.
他说，12月25日事件发生之后取消的签证数量相对较少，这反映了安检程序的基本效力。
He said the fact the number of new revocations since December 25 is relatively small reflects the basic strength of screening procedures.
但实际上，如果物品数量不够会发生什么？
But in reality, what should happen if item is not available?
不过，我们还应该考虑到，这篇文章讨论的主题是火灾发生率，也就是火灾的数量，而不是排放的规模。
However, we should also take into consideration that the article is mainly discussing fire incidence and occurence, meaning number of fires and not the size of emissions.
根据挪威难民委员会统计，因冲突而流离失散的非洲民众数量正在下降，但因气候变化而发生迁移的人口数量则在激增。
According to the Norwegian Refugee Council and other groups, the number of Africans displaced by conflict is falling, but the number displaced by climate change is climbing fast.
然而专家说，在巴基斯坦真实发生的“荣誉处决”的数量远比这个数字高，且从未对警察报告过，因为都被家庭成员以自杀掩盖了。
However, experts say that actual incidences of "honor killings" in Pakistan are much higher and never get reported to the police because they are passed off by the families as suicides.
史密斯和他的合作者的研究表明：到达深海的食物的数量随着时间发生巨大的变化。
Research by Smith and his coauthors has shown that the amount of food reaching the deep sea varies dramatically over time.
史密斯和他的合作者的研究表明：到达深海的食物的数量随着时间发生巨大的变化。
Research by Smith and his coauthors has shown that the amount of food reaching the deep sea varies dramatically over time.
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