在排卵期、精子化期或自然退化期，性腺体积变小。
After ovulation, spermiation or natural degeneration, the volume of gonad was smaller in stage VI.
说起来令人难过，人类的大脑从30岁起就开始功能自然退化。
Sorry to say, our brains naturally start slowing down at the Cruelty young age of 30.
如果病人原发肿瘤无法检测到，有可能肿瘤尚小，或者自然退化。
EtiologyIn patients whose primary site of cancer remains undetectable, the primary site presumably has remained small or, less likely, has regressed spontaneously.
比如伴随时间流逝的脊柱自然退化和脊髓发炎，这些会引起人们的压力和不安。
Over time, spinal vertebrae naturally degenerate and spinal facets become inflamed, causing stress and discomfort.
我们之前提到了世界各地热带地区中珊瑚礁的衰落，即自然和人为（造成的）压力是怎样造成珊瑚礁退化，或者甚至在某些情况下，造成它们死亡的。
We've been talking about the decline of coral reefs in tropical areas all over the world—how natural and man-made stresses are causing them to degrade or in some cases, to die.
世界自然基金会的一项研究显示，由于污染、气候变化和过度开发，中国的湿地正遭受退化的严重威胁。
A WWF research showed China's wetlands were seriously threatened by degradation because of pollution, climate change and overexploitation.
爱知目标要求到2020年大幅度降低包括森林在内的所有自然生境的丧失、退化和条块分割速度。
The Aichi targets call for a significant reduction in the rate of loss, degradation and fragmentation of all natural habitats, including forests, by 2020.
他还说，帮助早期人类寻觅食物，躲避捕食者的自然本能正让我们朝实验室白鼠的简单状态不断退化。
The natural impulses that helped early humans find food and avoid predators are causing us to regress to a state no more sophisticated than a rat in a laboratory, he said.
Sir Julian继续在成立诸如世界动植物基金，自然保护组织中扮演着重要的角色，他同时将人口的增长与环境的退化相联系起来。
Sir Julian went on to play a role in establishing what was then the World Wildlife Fund, a nature conservation agency, linking population growth to environmental degradation.
奥斯特罗姆教授对传统的“公地悲剧”理论发起挑战，她主张，社会和团体经常制定规则和执行机制，遏制自然界的退化。
Prof Ostrom has challenged the conventional "tragedy of the Commons" theory, arguing that societies and groups regularly devise rules and enforcement mechanisms which stop the degradation of nature.
佩奇博士说：“自然选择塑造了Y染色体，50年来，我们为Y染色体的退化争论不休，自然选择论更是加剧了这种争论。
“Natural selection is shaping the Y and keeping it vital to a degree that is really at odds with the idea of the last 50 years of a rotting Y chromosome, ” Dr. Page said.
由人类活动和自然因素综合作用导致的土壤退化已引起全球的日益关注。
Soil degradation induced by human activities together with natural factors has been attracting increasing attention in the world.
简而言之，绿色GDP的计算是从传统的GDP中扣除掉使国家自然资源枯竭和退化的成本而得出。
Simply put, Green GDP is calculated by deducting the cost of natural resources' depletion and environmental degradation from traditional GDP.
对黄河源区玛多县草地退化的自然和人为因素作了深入分析。
Natural and artificial factors of grassland degradation in Maduo County in source region of Yellow River were analyzed in this paper.
由于自然和人为因素的共同作用，黑土的质量发生了严重的退化，数量也急剧减少。
Because of complicated function of natural and artificial factors, the quality and quantity of black soil decreased and degenerated heavily.
“自然选择，特性的遗传变异和进化较慢的形式的退化” （查尔斯·达尔文）。
" Natural Selection, entailing Divergence of Character and the Extinction of less-improved forms" (Charles Darwin).
详述了近几十年来黑土资源质量的变化特征，分析了黑土质量退化的各种自然与人为因素。
This paper details the change characters of black soil quality, and analyses the natural and artificial factors of black soil degradation.
我国的草地资源主要分布在西北地区，近年来，在自然和人为因素的双重作用下，草地退化十分严重。
The rangeland resources distribute on the northwest of China, however the rangeland degradation is very serious under the effects of the nature and human recently.
草地退化的SRYYR所造成的综合影响，人为和自然因素的影响。
Grassland degradation in the SRYYR is caused by the integrated effect of anthropogenic and natural factors.
由于人类对河流水文状态的过度干扰，原有的自然水生态系统逐步退化。
Owing to the excessive disturbance of human being to river hydrological conditions, the intrinsic natural water-ecosystem has degraded gradually.
由于自然因素和人为因素的影响，区域生态环境功能不断退化。
Because of the influence of the nature factor and the artificial factor, district ecosystem environment the function is continuously deteriorating.
土壤侵蚀是造成环境退化的一个主要因素，长期以来，由于人类不合理的利用自然资源，导致植被生存的环境受到极大的破坏，引发了严重的土壤侵蚀。
Soil erosion is a major factor of causing environmental degradation. For a long time, human irrational utilization of natural resources is destroying the vegetation and thus leads to serious erosion.
应从系统的角度认识黄河三角洲滨海湿地与区域自然灾害的关系，科学对待并切实缓解滨海湿地的损失和退化。
The relationship between coastal wetland and natural disasters in Yellow River Delta should be recognized systematically, and loss and degradation of the coastal wetland should be abated practically.
黑钙土样地选择在大田，草甸土选择在羊草自然保护区内，草甸碱土选择在退化草地碱斑部位。
The Black Calcium soil plots were conducted in farmland, the meadow soil in the Natural Reserves, and the meadow alkali soil in the degraded grassland with saline bowls.
产生土地退化的原因，不仅仅是土地资源特点与自然环境这样一些自然因素，还包括一些社会与经济因素。
The causes of land degradation not only include the natural factors, such as the characteristics of land resources and the natural environment, but also the social and economic factors.
当前后现代社会出现了人与自然的矛盾、科技的悖论、高度组织化、人的自然力退化等问题。
There are various problems such as contradiction between human and nature, scientific combat extremely organization way, degeneration of human natural power in contemporary post-modern society.
本文以废黄河三角洲为例，分析了废黄河三角洲生态系统退化的自然和人为应力以及生态系统的退化过程。
Taking the abandoned delta of Huanghe River as a case, this paper analyzed the natural and artificial driving forces of ecosystem degeneration, with the degeneration course investigated.
不合理人类活动是草地退化的主要驱动因素，决定了自然条件基本相同地区的草地退化强度的空间分异。
Irrational human activities, which decide the spatial distribution of grassland degradation intensity under the similar natural conditions, are the main driving factors of grassland degradation.
不合理人类活动是草地退化的主要驱动因素，决定了自然条件基本相同地区的草地退化强度的空间分异。
Irrational human activities, which decide the spatial distribution of grassland degradation intensity under the similar natural conditions, are the main driving factors of grassland degradation.
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