That is, the amount of debris... Currently in orbit has reached a threshold where it will continually collide with itself, further increasing the population of orbital debris.
这就是说，现在在轨道上的残骸的数量已经到达了一个数值，然后它们就会慢慢开始自己相互碰撞，这样就会产生新的碎片。
Some bioluminescent bacteria, for example, light up when their population exceeds a threshold size (Journal of Bacteriology, vol 104, p 313).
例如有些生物发光菌当他们的数量超过某个界限值就会发光。
Most studies could not quantify disease frequency in the general population as they are hospital-based and confounded by variations in threshold and the rate of hospitalization.
多数研究不能把一般人群当中的发病频率给予定量是因为它们是基于医院的并且被混杂在住院率的变化之中。
Their research showed that when the number of trap cells exceeded a key threshold in the mixtures, the virus population could no longer sustain itself and declined toward extinction.
他们的研究显示：当诱骗细胞的数量在混合物超过一个关键阈值时，病毒群不能再自我维持并趋向灭绝。
Economic threshold for this pest insect was estimated by measuring the increasement rate of population density.
并提出用害虫种群潜在密度确定卷叶螟经济阈值的方法。
The paper discusses the dynamic characteristic of population supporting capacity of land from three aspects; the threshold area per capita, the absolute supporting capacity and the relat.
文章分别从人均耕地阈值、绝对承载力与相对承载容量三个不同角度来探讨分析了山西省土地资源人口承载力的动态变化特征。
By use of rate equations, we have analyzed the effect ot laser wavelength radiation in pump light source on excited state population accumulation of laser medium and laser threshold.
本文用速率方程分析了泵浦光源中激光波长辐射对激光介质激发态粒子数积累和激光器阀值的影响情况。
By applying certain threshold levels, 40 countries were identified with the most urgent population problems.
通过用某些限界标准衡量，四十个国家存在着最紧急的人口问题。
The blue and dark blue colors indicate counties with below average poverty levels and prosperous counties - those with fewer than 10 percent of the population below the poverty threshold.
蓝色和深蓝色分别表示低于平均贫困水平的乡村和繁荣的乡村- - - - -少于10%的人在贫困线以下。
The blue and dark blue colors indicate counties with below average poverty levels and prosperous counties - those with fewer than 10 percent of the population below the poverty threshold.
蓝色和深蓝色分别表示低于平均贫困水平的乡村和繁荣的乡村- - - - -少于10%的人在贫困线以下。
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