是指生物的种群密度水平比平常显著增高而言。大发生亦称为异常发生。通常是在适宜的条件下大量增殖引起的，但在局部地方也常由于外来的集群迁入而引起。
网络释义专业释义
文章摘要 关键词 草地螟 大发生 预测预报 空间分布[gap=2047]Key words Loxostege sticticalis;outbreak;forecasting;spatial distribution
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... 出现,发生 arise 大发生 mass outbreak; massoutbreak; outbreak 导致，发生 lead to ...
基于4个网页-相关网页
短语
癫痫大发生发火 epilepsy grand mal
蔓延性大发生 spreading-out type outbreak
渐进性大发生 gradation
周期性大发生 [动] [植保] cycle outbreak
大孢子发生 [植] megasporogenesis ; megor netorogenesis
期大发生发火 epilepsy withgrand mal on awakening ; EGMA
又称大发生发火 grand mal
悟期大发生发火 epilepsy withgrand mal on awakening
大电流发生器 Strong current generator ; SLQ ; RXDG ; HNDDL
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outbreak - 引用次数：1 参考来源 - 2006年安庆地区褐飞虱大发生特点及其原因分析 Characteristics and reasons of the outbreak of the brown planthopper Nilaparvata lugens in Anqing in 2006mass outbreakmass-outbreak
·2,447,543篇论文数据，部分数据来源于NoteExpress
双语例句原声例句
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卡森问我在亚特兰大发生了什么事？
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这在加拿大发生过几次，加拿大发生了类似的事件而且没有再次发生。
It happened a few times in Canada where we had similar events and it didn't happen again.
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以上结果表明红细胞增多可能在慢性缺氧性肺动脉高压和右室肥大发生起着重要作用。
These results proved that polycythemia may play an important role in pathogenesis of chronic hypoxic pulmonary hypertension and cardiac hypertrophy.
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He had the feeling that everything he saw was a broken-off piece of some giant blank thing he had forgotten had happened to him.
他有种感觉,觉得他看见的一切都是之前发生过的,他已经忘记的,某件大而无用的事掉落的碎片。
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You know, we've done a bunch of thermochemistry, and we've kind of seen that the energy of mixing, your energetics don't change too much as a function of temperature.
我们做过很多的化学热力学习题，某种程度上我们发现混合的能量，并不随着能量,发生大的改变。
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Remember that these cells are relatively large compared to bacteria and so diffusion doesn't occur very quickly over this length scale.
要知道这些细胞相对细菌而言,还是比较大的,扩散作用在这种尺度上,发生得不是那么快
应用推荐
$firstVoiceSent
- 来自原声例句