查询词典 ecosystems

We choose the arid land of northwestern China as our study area because of its extensive area, specific geographical location, dry climate, varied topography, vulnerable ecosystems and long-term human disturbance, as well as the existence of current conflicts between economic development and environmental protection. Based on the literature, we choose ten desert species with clear and relatively accurate geographical distribution ranges to model their distributions:Anabasis brevifolia, Atraphaxis frutescens, Calligonum mon-golicum, Ephedra przewalskii, Gymnocarpos przewalskii, Haloxylon ammodendron, Haloxylon persicum, Ka-lidium cuspidatum, Salsola laricifolia, and Sympegma regelii.

：选择面积广阔、地理位置特殊、气候干旱、地形地貌多样、生态系统脆弱以及人类活动长期干扰，而且目前面临着西部大开发和环境保护双重矛盾的西北干旱区作为研究区域，通过收集西北干旱区多种优势种和常见种的地理分布资料，选取10种分布范围相对明确、资料相对齐备的荒漠植物种：短叶假木贼、木蓼(A- traphaxis frutescens)、沙拐枣、膜果麻黄、裸果木、梭梭柴、白梭梭、尖叶盐爪爪、松叶猪毛菜(Salsola lar- icifolia)和合头草，定量分析其地理分布与气候因子的关系，并据此估测其潜在中心分布区和潜在最大分布范围，与实际分布范围进行比较。

The variety of terrestrial and aquatic ecosystems found in an area or on the earth.

各种各样的陆地和水生生态系统发现某一地区或在地球上。

Professor Barbier was a coauthor. What's different now is the urgency — we get news of nature disappearing every day — and new tools for measuring value, since research on ecosystems and valuation metrics have been evolving steadily over the last 20 years.

在过去二十多年，从人们对生态系统和评估度量进行研究以来，我们每天都听到有关大自然正在消失和研制评估价值的新工具的消息，差异在哪里是我们亟待解决的问题。

The Great Barrier Reef in Australia is one of the oldest ecosystems in the world.

澳洲大堡礁是地球上最古老的生态系统之一。

It can be directed against enemy countries or 'friendly nations' without their knowledge, used to destabilise economies, ecosystems and agriculture.

它能够被施与敌国或"友好国家"而不被其所知，被用于使经济、生态系统和农业动荡不定。

Stress or disturbance can be regarded as not only be a normal phenomena for the ecosystems, but also be regarded as indispensable ecological characteristic for all level of ecosystem.

对于中尺度生态系统健康纵向上的定量化"健康"评价研究的主要瓶颈在于找到"健康"生态系统的标准。

The salt-loving tall grass thrives in beach ecosystems and helps to form and protect sand dunes by collecting windblown grains.

盐喜欢高大的草茎繁荣蓬勃在海滩的生态系统，并帮助形成和保护沙丘通过收集被风吹起的粮食。

The salt -loving tall grass thrives in beach ecosystems and helps to form and protect sand dunes by collecting windblown grains.

喜盐的高大草本植物在海滨生态系统长势良好，并且有助于保护由风吹走的麦粒堆积而形成的沙丘。

Benthos The organisms that live on the bottom sediments of freshwater and marine ecosystems.

底栖生物：在淡水或海洋生态系统底部生活的生物体。

SOA Key Laboratory of Marine Ecosystems and Biogeochemistry, Hangzhou 310012, China

国家海洋局海洋生态系统与生物地球化学重点实验室，浙江杭州 310012

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。