| dose (The amount of test substance administered. Dose is expressed as weight of test substance (g, mg) per unit weight of test animal (e.g., mg/kg), or as weight of food or drinking water) |
剂量 |
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| dose-effect relationship (The relation between the quantity of a given substance and a measurable or observable effect) |
剂量与效果关系 |
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| draft fire |
逆火 |
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| draft legislation (An initial unsigned agreement, treaty, or piece of legislation which is not yet in force) |
草案立法 |
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| dragonfly (Any of the insects composing six families of the suborder Anisoptera and having four large, membranous wings and compound eyes that provide keen vision) |
蜻蜓 |
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| drainage (1. Removal of groundwater or surface water, or of water from structures, by gravity or pumping. 2. The discharge of water from a soil by percolation (the process by which surface water moves downwards through cracks, joints and pores in soil and rocks)) |
排水 |
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| drainage system (A surface stream, or a body of impounded surface water, together with all other such streams and water bodies that are tributary to it and by which a region is drained. An artificial drainage system includes also surface and subsurface conduits) |
排水系统 |
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| drainage water (Incidental surface waters from diverse sources such as rainfall, snow melt or permafrost melt) |
排放水 |
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| draining (The removal of water from a marshy area by artificial means, e.g. the introduction of drains) |
排水 |
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| draught animal |
拖拽动物 |
|
| drawing (To cause to discharge from an abscess or wound or to obtain a sample of tissue or organic liquid for examination) |
抽检 |
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| dredged material (Unconsolidated material removed from rivers, streams, and shallow seas with machines such as the bucket-ladder dredge, dragline dredge, or suction dredge) |
疏浚物质 |
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| dredged material |
挖泥机捞出物 |
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| dredging (Removing solid matter from the bottom of a water area) |
疏浚 |
|
| drift net fishing (The use of fishing nets of great length and depth, aptly described as "walls of death" because of the huge numbers of marine mammals, birds, and turtles that became ensnared in them. The Tarawa Declaration of 1989 formulated at the 20th South Pacific Forum, aimed at banning drift netting in the South Pacific. In June 1992 the UN banned drift netting in all the world's oceans) |
漂流网捕鱼 |
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| drift smoke |
漂移烟尘 |
|
| drill |
训 〔操〕 |
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| drilling (The act of boring holes in the earth for finding water or oil, for geologic surveys, etc.) |
钻探 |
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| drilling for oil (Boring a hole for extracting oil) |
钻探石油 |
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| drilling installation (The structural base upon which the drill rig and associated equipment is mounted during the drilling operation) |
钻探装置 |
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