自然衰退,dieback
1)dieback自然衰退
英文短句/例句

1.Mental and physical deterioration both occur naturally with age.随着年龄的增长,心智和体力自然衰退
2.Decline of Natural Beauty and Maturity of Aesthetic Behaviors;自然美的衰退与人的审美行为的成熟
3.It encompasses soil degradation and the deterioration of natural landscapes and vegetation”.它包括土壤退化和自然景观和植被的衰退。
4.In spite of the recession, car sale is five percent up.尽管经济衰退,汽车销售仍然上升了5%。
5.They do differ, however, on the proposition that a liberal monetary policy can move the economy effectively out of a recession.然而,在自由主义的货币政策是否可以有效地使经济摆脱衰退这个问题上,他们的观点确实不同。
6.Since last year, Taiwan compatriots have experienced the dual attacks of economic recession and natural disasters, to which we deem as our own sufferings.去年以来,台湾同胞经受了经济衰退与自然灾害的双重侵袭,我们对此感同身受。
7.When profit diminishes, merchants are very apt to complain that trade decays; though the diminution of profit is the natural effect of its prosperity.当利润减少时,商人们往往都埋怨说,商业衰退了,可是利润减少乃是商业繁盛的自然结果。
8.The old man felt life was ebbing away from him.老人感到自己的气力正在日渐衰退。
9.She was conscious that her memory was failing.她意识到自己的记忆力在逐渐衰退。
10.degradation and exhaustion of natural resources自然资源的退化和耗竭
11.An abrupt failure of function, strength, or health; a breakdown.崩溃功能、力量或健康方面的突然衰退;崩溃
12.A Comparison Study on Nature Aging Mice and D-galatose Aging Model Mice自然衰老小鼠与D-半乳糖衰老模型小鼠的比较
13.The old man was well aware that his strength was petering out, but he still worked as best he could.老人明知自己的体力在衰退,可是还是努力工作。
14.Hence, some men never recognise the turning in the tide of their abilities.因此,有些人从未意识到自己能力的衰退。
15.The intense competition from overseas has caused the cotton industry to fall into a decline来自海外的激烈竞争已使棉花工业争入了衰退。
16.Are we talking ourselves into a recession?我们是否在通过言辞将自己推入经济衰退?
17.My speed in long races had been declining since I had become a masters runner.我长跑的速度自从我成为老练的跑者后就衰退。
18.Symptoms include uncontrolled moements, emotional disturbances and mental deterioration.其症状包括部不自主运动,情绪紊乱及智能衰退。
相关短句/例句

decline of natural resources自然资源衰退
3)inbreeding depression自交衰退
1.Preliminary study on inbreeding depression of Dendranthema morifolium菊花自交衰退现象初步研究
2.By examining seed number of per flower,plant height,yield of per plant,1 000-grain weight and oil content of self-bred progenies of Qinghai Dahuang rape,inbreeding depression of the variety was investigated.研究结果表明:青海大黄油菜与青油241相比,其自交衰退缓慢。
3.An interspecific hybrid of upland cotton,Suza 16,was selected as study materials to measure the heterosis and inbreeding depression of 14 traits of Suza 16 F_1 and F_2 in 1997~1998 successively.以陆地棉品种间杂交种“苏杂 16”为材料 ,连续两年测定其F1、F2 的 14个性状的杂种优势和自交衰退率。
4)natural attenuation自然衰减
1.The effect of temperature on natural attenuation and bio-augmented degradation of nitrobenzene-contaminated sediments;温度对底泥中硝基苯的自然衰减及强化降解的影响
2.The applications of new methods,materials and techniques were summarized,such as oxidation,air-stripping,absorption,biodegradation and natural attenuation etc.主要介绍了含MTBE废水处理的工艺进展以及一些新方法、技术在实验以及生产实践中的应用 ,如氧化、气提、吸收、降解和自然衰减等 ,同时对各种方法的优缺点进行了评述 ,对未来的工艺进步做了展
3.Natural attenuation of contaminant in ground water is an essential area of solution to ground water pollution and the basic research of remedial approach.污染物在地下水中的自然衰减是目前解决地下水污染问题的一个重要的研究领域 ,是地下水污染生物修复的基础课题。
5)Large scale pathloss自然衰落
6)natural blossom-decline自然兴衰
延伸阅读

国际自然与自然资源保护联盟  由有志于自然保护的各国家成员、其他合作机构和有关的科学工作者组成。建于1948年。多年来,它与世界野生生物基金会、联合国各机构、各区域性组织和其他重要团体密切合作,开展全球性自然资源保护活动,属下有包括116个国家的537个会员组织。联盟大会、理事会和各专业委员会是其管理机构。执行机构为秘书处,总部设在瑞士的格兰德。下设由150多名专家组成的6个专业委员会,即:生态委员会,教育委员会,环境规划委员会,环境政策、法律、行政管理委员会,国家公园及保护区委员会;另外还有各种特设小组或由著名专家为审议重大问题而组成的顾问小组。联盟在非洲、中南美洲、北美洲与加勒比海、东亚、西亚、澳大利亚及大西洋、东欧、西欧等 8个地区还设区域顾问。联盟秘书处负责指导、督促各委员会及各区顾问的工作;推动各项计划的实施;支持各种项目的实施;组织制订保护法规等。全体会员代表大会每3年召开一次,选举新的主席和执行主席,研讨各种有关自然保护的技术问题。1979年,中国以国务院环境保护办公室的名义参加这个国际组织。1984年10月 5日联盟理事会第15次会议,通过决议接纳中国野生动物保护协会为联盟非政符团体会员。