由于这些结构的出现可以追溯到各代祖先，所以它们可以作为进化的标志；没有一个生物体身上的退化器官是祖先没有的。
Because these structures can be traced back through the ancestors, they essentially serve as a marker of evolution; no organism can have a vestigial organ that hasn't been found in its forefathers.
但是这份报告哀叹道：当前有数不胜数的交易及收获中的野生产品严重缺乏监督，结果导致生物栖息地退化，物种资源衰竭。
But the report laments that far too much of the harvesting of, and trade in, wild products is poorly supervised, with the result that habitats are degraded and stocks depleted.
跟退化结构相似的概念还有返祖现象，它的意思是生物体身上重新出现直系祖先没有的结构或特征。
Similar in concept to vestigial structures are atavisms, which are the reappearance of a structure or trait that isn't found in the immediate ancestors.
令人担忧的问题包括家禽粪便养分和病原微生物造成的地表水和地下水退化。
Concerns include the degradation of surface and groundwater owing to poultry waste nutrients and pathogenic microorganisms.
比如人类胚胎会发育出腮、蹼足和退化的尾巴，映现出远古水生生物的性状。
Human embryos, for instance, develop, then lose, gills, webbed feet and rudimentary tails, reflecting their ancient aquatic life styles.
在1972年到2002年间，由于伐木和赖以生存的农业生产，巴布亚新几内亚的热带雨林减少或退化了24%左右，根据世界野生生物基金会报告。
Between 1972 and 2002, about 24 percent of Papua New Guinea's rain forests were cleared or degraded by logging or subsistence agriculture, according to the WWF report.
由于栖息地的丧失或退化，外来物种、气候变化、过度采伐、环境污染以及野生物疾病的影响，各类物种正在受到威胁。
Species are being threatened by habitat loss and degradation, invasive species, climate change, over-exploitation, pollution and wildlife disease.
本标准使用的老化条件并不试图去模拟当地气候现象如大气污染、生物侵蚀，以及盐水老化导致的性能退化。
The exposure used in this practice is not intended to simulate the deterioration caused by localized weather phenomena such as atmospheric pollution, biological attack, and saltwater exposure.
因此设计者应重视将动植物种类如何成功地引入基地中，增加湿地的生物学优势，减少由于忽略植被而造成的湿地退化。
Hence designers should focus on successful introduction of flora and fauna to the site to initiate the biological benefits of the wetland and reduce the opportunities for degradation due to neglect.
有些异族生物学家推测克雷特龙是由传说中杜伊诺格伍因星龙退化后的后裔。这种野兽的另一个亲戚是更矮壮的凯尔龙。
Some xenobiologists postulate that the krayt dragons are the degenerate descendents of the fabled Duinuogwuin Star Dragons. Another relative of the beasts is the stockier kell dragon.
睡眠是一个生物必要性退化充电后身体一整天的活动。
Sleep is a biological necessity that rejuvenates and recharges the body after a day long of activities.
粉红是跟爱和原谅有关的光线，会在生物体的退化、受伤、溃烂部位触发自我疗愈序列。
Pink is associated with the ray of love and forgiveness and triggers sequences of self healing in degenerated, wounded or decayed regions of the biology.
当前世界范围内对土地退化的治理，基本方法仍是基于生态学理论的生物方法。
Currently, the basic control ways of land degradation in the world are still based on the ecological theory and the biological ways.
瑞典卡罗林斯卡医学院表示，这三位科学家解决了生物上的一个重大问题：染色体在细胞分裂时怎样避免退化。
The Karolinska Institute in Sweden said the three scientists have solved a major problem in biology: how chromosomes are protected against degradation during cell division.
从70年代后期开始，人们越来越多地发现在工程、社会、经济和生物等很多方面的实际问题中普遍存在着退化现象。
From the late 70s, more and more people found degradation generally consisted in the practical problems of engineering, social, economy and biology, and many other aspects.
本文对滨海湿地退化的主要原因进行了分析，指出围垦、城市与港口开发、污染及生物资源过度利用是造成滨海湿地退化的主要因素。
Land reclamation, city and port development, pollution and excessive use of coastal biologic resource are considered as the main environmental forcing factors to the degradation of coastal wetlands.
轻度退化草地地下生物量明显高于退化草地。
Belowground biomass in light degraded grassland is higher than in severely degraded grassland.
它也许还可以为多种疾病锁定已知的生物标记，这些标记包括HIV、癌症、克雅氏病- - -一种退化性神经错乱。
Potentially, it also could target known biomarkers for a wide variety of diseases, including HIV, cancer and Creutzfeldt-Jakob disease, a degenerative neurological disorder.
库区土壤退化类型有贫养分化、贫微生物化、结构劣化、碱化和严重干旱化。
The main types of soil degradation were of poor nutrients, poor microorganism, bad structure, basification and heavy drought.
一些科学家怀疑这种论断：种种有机体随时间流逝而退化，这是生物不可避免的结果。
Some scientists are dubious of the claim that organisms degrade with age as an inevitable outcome of living.
以M类微生物发酵泥、发酵液等为配方制作的活性优质窖泥成功地解决了人工窖泥易退化的问题。
Quality active pit mud (produced by m group fermenting mud and m group fermenting liquid etc.) could be used to settle the frequent problem of manmade pit mud degeneration.
退化喀斯特植被恢复增加了土壤微生物生理类群数量，使土壤质量得以提高。
The soil amounts of microbial physiological group increased with vegetation restoration of degraded Karst, which indicated the soil quality has been improved gradually.
干旱、盐害、极端温度、化学毒害和氧化胁迫等非生物胁迫严重影响农业生产，并导致环境退化。
Abiotic stresses, such as drought, salinity, extreme temperatures, chemical toxicity, and oxidative stress, are serious threats to agriculture and result in the deterioration of the environment.
土壤微生物在土壤生态系统中的作用重大，然而退化生态系统有关土壤微生物的研究相对缺乏。
Soil microorganisms play a major role to soil ecosystem, however littele information is available about soil microorganisms of degenerated ecosystem.
没有具体的信息，请有关的生物的凝析油的酚醛和柏油成分退化。
No specific information is available about the bio-degradation of the phenolic and tarry constituents of the condensates.
没有具体的信息，请有关的生物的凝析油的酚醛和柏油成分退化。
No specific information is available about the bio-degradation of the phenolic and tarry constituents of the condensates.
应用推荐