| 沙丘固定 |
sand dune fixation (Stabilization of dunes effected by the planting of marram grass (Ammophila arenaria), or rice grass, whose long roots bind the surface layers of sand and so hinder its removal by wind. A larger scale method of dealing with the same problem is by afforestation) |
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| 沙漠 |
desert (A wide, open, comparatively barren tract of land with few forms of life and little rainfall) |
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| 沙漠蔓延 |
desert creep |
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| 沙漠蔓延 |
desert encroachment |
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| 沙漠化 |
desertification (1. The development of desert conditions as a result of human activity or climatic changes. 2. The process of land damage which allows the soil to spread like a desert in arid and semi-arid regions. There is a loss of vegetative cover and the soil deteriorates in texture, nutrient content and fertility. Desertification affects the lives of three-quarters of the world's population, 70% of all drylands and one quarter of the total land area of the planet. There are many reasons for desertification, but the majority are caused by human activities, overgrazing, deforestation, poor land management and over-exploitation. Agenda 21 states that the priority in combating desertification should be establishing preventive measures for lands that are not yet, or are only slightly, degraded) |
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| 沙漠化控制 |
desertification control (Remedial and preventive actions adopted against desertification include irrigation, planting of trees and grasses, the erection of fences to secure sand dunes, and a careful management of water resources) |
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| 沙漠化控制 |
control of desertification |
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| 沙漠蝗虫 |
desert locust |
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| 沙漠型气候 |
desert climate (A climate type which is characterized by insufficient moisture to support appreciable plant life; that is, a climate of extreme aridity) |
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| 沙漠侵蚀 |
desert creep |
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| 沙漠侵蚀 |
desert encroachment |
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| 沙坪 |
sand flat (A sandy tidal flat barren of vegetation. A tidal flat is an extensive, nearly horizontal, marshy or barren tract of land that is alternately covered and uncovered by the tide, and consisting of unconsolidated sediment (mostly mud and sand). It may form the top surface of a deltaic deposit) |
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| 沙门氏菌 |
salmonella (General name for a family of microorganisms, one of the largest groups of bacteria, that includes those most frequently implicated in food poisoning and gastroenteritis. Unhygienic handling and inadequate cooking of poultry and meat, improper storage of cold meats and, more recently, contamination of battery-reared hen eggs, are the most common sources of salmonella infections) |
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| 沙石开采 |
sand extraction (The extraction of sand by mining for building purposes and for the extraction of heavy minerals such as rutile and zircon) |
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| 沙巴拉群落灌木 |
Chapparal shrub |
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| 钙 |
calcium (A malleable silvery-white metallic element of the alkaline hearth group; the fifth most abundant element in the earth crust, occurring especially as forms of calcium carbonate. It is an essential constituent of bones and teeth and is used as a deoxidizer in steel) |
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| 龙卷风 |
tornado (A rapidly rotating column of air developed around a very intense low-pressure centre. It is associated with a dark funnel-shaped cloud and with extremely violent winds (>300km/h) blowing in a counterclockwise spiral, but accompanied by violent downdraughts. The precise mechanisms are not fully understood but the following atmospheric conditions appear to be necessary for tornado development: a layer of warm moist air at low altitude; a layer of dry air at higher altitude with an inversion of temperature at about 1.000 m; a triggering mechanism, usually in the form of an active, intense cold front or solar heating of the ground which will create a vortex) |
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| 亚洲 |
Asia (The world's largest continent. It occupies the eastern part of the Eurasian landmass and its adjacent islands and is separated from Europe by the Ural Mountains. Asia borders on the Arctic Ocean, the Pacific Ocean, the Indian Ocean, and the Mediterranean and Red Seas in the west. It includes the largest peninsulas of Asia Minor, India, Arabia, and Indochina and the island groups of Japan, Indonesia, the Philippines, and Ceylon; contains the mountain ranges of the Hindu Kush, Himalayas, Pamirs, Tian Shan, Urals, and Caucasus, the great plateaus of India, Iran and Tibet, vast plains and deserts, and the valleys of many large rivers including the Mekong, Irrawaddy, Indus, Ganges, Tigris and Euphrates) |
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| 亚洲环保理事会 |
Asian Environment Council |
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| 亚硝酸盐 |
nitrite (A salt or ester of nitric acid, included in compounds such as potassium nitrite, sodium nitrite and butyl nitrite) |
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