有证据表明，这一时期发生了重大的生态和地质变化。
There is evidence of major ecological and geological changes during this period.
如果把生态系统保护好、经营好，像狭足袋鼩这样的物种在残酷的萧条时期就有更多的生存机会。
Species like the lesser hairy footed dunnart have a better chance of survival during the unforgiving bust periods if their ecosystem is protected and well managed. (Dr Adam Kerezsy)
在北澳大利亚兰杰（Ranger）铀矿26年开发史的大部分时期内，它一直受到来自生态学家的抗议，他们反对在一个世界遗产公园的周边地区开发铀矿用于核燃料生产。
FOR much of its 26-year life the Ranger uranium mine in north Australia has seen protests from ecologists who oppose digging for nuclear fuel on the edge of a world heritage park.
我确信你能领会到每个人生态度都能在特定的时期帮助我们塑造我们的人生。
I’m sure you will appreciate that each of these different views of happiness can shape our life in a particular way.
在这本有趣的书中，海伦-思卡尔斯(更恰当来说，她是个海洋生物学家)阐释了维多利亚时期人们口中“没人要的鱼”的传说、生物学原理和生态学原理。
In this fascinating book Helen Scales, an aptly named Marine biologist, explains the myth, biology and ecology of what the Victorians called "queer fish".
地史时期森林的变迁主要是由于生态环境的变动；
The former is due to the variations of the ecological factors.
美国布朗大学古生态学家杰茜卡-怀特塞德曾经主持了一项关于晚三叠纪时期火山活动的研究。 怀特塞德认为，鲁尔的研究成果要想得到广泛的支持，必须要寻找更多的证据来提供更为合理的解释。
According to paleobiologist Jessica Whiteside of Brown University, a leading researcher on end-Triassic vulcanism, more evidence is needed before Ruhl’s interpretations are conclusively supported.
中国北方地区在过去的历史时期曾经有广泛分布的森林和草原，生态环境良好。
There are many forest and grassland in north China in ancient time, and ecological environment was in balance.
“千禧生态系统评估”的负责人沃尔特·里德说，在过去50年中，人类对生态系统的改造比历史上的任何时期都更为迅速而广泛。
Walter Reid, director of the Millennium Ecosystem Assessment, said over the past 50 years humans had changed ecosystems more rapidly and extensively than any comparable period in human history.
生态旅游在世界范围内正经历着一个蓬勃发展的时期。
Ecological tourism just experience a vigorous development period in the world scope.
处在社会转型时期的中学生，面对着复杂的文化生态环境和多元文化的价值选择。
The middle school students in the social transition stage are facing complex cultural ecological environment and the value choice of pluralistic cultures.
由于不同时期人类对自然环境、生态系统以及人类自身认识程度的不同，环境立法理念经历了变化。
The legislative idea of environment law has undergone historical transition because of the different understanding degree about the natural environment, the ecosystem and human beings.
本文首先对先秦时期的生态环境与人文环境进行了全面的考察和分析。
Firstly, we completely investigated and analysed the ecosystem environment and the humanities environment of the Early Qin Dynasty in this test.
在过去50年中，人类对生态系统的改造比历史上的任何时期都更为迅速而广泛。
Over the past 50 years humans had changed ecosystems more rapidly and extensively than any comparable period in human history.
然而人类文明取得巨大进步的这个世纪也正是地球生态平衡遭受最严重破坏的时期。
However, the recent century in which human civilization achieved significant progress have witnessed the most serious devastation of global ecological balance in the history of mankind.
作为晚清小说传播的主要载体，晚清小说期刊以最本真的“原生态”方式见证了这段特殊的历史时期。
As main carrier of the spreading of Late Qing novel, Late Qing novel periodical witnessed these special historical period in a true "original ecology" way.
这一历史时期，文峪河上游植被的破坏，直接导致了流域生态环境恶化。
During this period, the destruction of the vegetation in Wenyu drainage area leads to the ecology environment depravation of the area.
曾有一段时期，由于过度放牧和肆意毁林，山区生态环境遭到严重破坏，动植物资源明显减少。
At one time, due to excessive herding and reckless deforestation, the ecological environment of the mountain area was severely damaged, and the resources of animals and plants significantly dwindled.
在新时期，林业高科技企业不仅呈现出生态化和社会化的趋势，而且显现出科技含量高、优秀人才多等特征。
Forestry high-tech enterprise not only shows the trend of ecology and society, but also appears thecharacteristic of high technology content and many excellent professional in new period.
在短暂的人类历史时期，土默特平原经历了由草原生态环境到农田生态环境的变迁过程。
Throughout short human history, Tumote Plain experienced the process from grass ecological environment into farmland ecological environment.
在干旱时期，湖面缩小，而且植物也衰败成小的生态环境。
In dry times the lakes dwindled and the plants declined to niches.
本文从生态学能量流的角度研究了简阳县不同时期农田系统能量投入量、投能结构，投能效率及能量投入产出关系。
The energy inputs and their structure, efficiencies, and the relationship between energy input and output in the farmland ecosystem of Jianyang County were studied in this paper.
结果表明，气候生态条件对稻米生化品质各组分有重要影响，且不同组分的影响形式和关键时期不同。
The results showed that climate conditions had a great effect on the biochemical qualities of paddy rice, which was different in ways and in critical periods.
引入生态化教育的理论和实践是新时期株业培训的必然选择。
It is an inevitable choice to introduce ecological education theory and practice as the essential content of forestry training in the new period.
本文论述了历史时期我国绿洲农业开发的基本进程，分析了农业开发对生态环境的影响。
This paper analyses the progress of Chinese oasis agriculture in history and the effect of agricultural exploitation to ecological environment.
本文论述了历史时期我国绿洲农业开发的基本进程，分析了农业开发对生态环境的影响。
This paper analyses the progress of Chinese oasis agriculture in history and the effect of agricultural exploitation to ecological environment.
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