Rare earth, an nonrenewable resource, is a general name for 17 low-reserve metallic elements.
稀土是储量较少的一类金属的统称。
Arsenic and lead are also naturally occurring metallic elements that have varieties of USES in industry from insecticides to electronics.
砷和铅也是天然形成的金属元素，在工业上从制造杀虫剂到应用于电子工业，它们有着多种用途。
This process not only recovered the toxic cyanide and the valuable metallic elements in the wastewater effectively, but also improved the ratio of resource comprehensive utilization.
该工艺不仅可有效回收剧毒物质氰化物，同时也可选择性回收其中的有价金属铜等，提高资源综合利用率及经济效益。
Seabed manganese nodules contain a great deal of metallic elements such as manganese, iron, copper, cobalt and nickel, and they were thought as an important substitute resource for land ore.
海底锰结核中含有大量的锰、铁、铜、钴、镍等金属元素，被公认为是一种重要的陆地矿产替代资源。
The electroplating sludge is complicated in nature containing many kinds of metallic elements and it will cause serious environmental pollution and resource waste if discharged without treatment.
电镀污泥含有多种重金属元素，性质复杂，如果不加处理排放，将会造成严重的环境污染和资源浪费。
Radium, uranium, and thorium are radioactive metallic elements.
镭、铀和钍都属于放射性金属元素。
Other pollutants under study include the metallic elements called heavy metals.
其他一些正在被研究的污染物包括重金属元素。
The process in which plants absorb metallic elements is mostly an initiative absorption process.
植物吸收金属元素的过程主要是一个主动吸收过程。
Curved metallic elements make up the structure of the tent and support a fabric shell that protects visitors from inclement weather.
弯曲的金属元素构成了帐篷的结构并支撑织物的外壳，保护游客免受恶劣的天气影响。
The electroplating sludge is one kind of solid wastes from disposal of electroplating wastewater, including various heavy metallic elements.
而电镀污泥是电镀废水处理后产生的固体废弃物，含有多种重金属元素。
The structural system and the lateral facades where built up with prefabricated metallic elements in order to shorten the construction time.
结构系统和侧立面由预制金属构件组成，以便缩短建设周期。
The effect and working mechanism of skeleton material, carbide-forming elements, rare-earth and non-metallic elements in the bond are discussed.
重点阐述了骨架材料、碳化物形成元素、稀土、非金属元素等在金属结合剂的作用及其影响机理。
The contents of trace, poisonous and harmful heavy metallic elements in stable bound-state sulfide in soils can be calculated by systematic cluster analysis.
采用系统聚类分析方法，能定量地分析稳定的硫化物结合态微量有毒有害重金属元素的数量。
The experimental results showed that sequential scan ICP-AES method could be used for determining metallic and non-metallic elements in various environmental samples.
实验结果表明，顺序式扫描ICP - AES法可用于各种环境样品中金属和非金属元素的分析测定。
However, during the period of circulation use of scrap steel, it causes the content increase unceasingly of the low melting point metallic elements such as Pb in the steel.
但在废钢的循环使用过程中，不可避免地将铅等低熔点金属带入到炼钢炉中。
The technogenic sedimentation refers to the precipitation of gypsum, calcite, fluorite, as well as hydroxides, oxides and salts of some heavy metallic elements from polluted groundwater.
后者是指从被污染地下水中沉淀析出石膏、方解石、萤石以及某些重金属元素的氢氧化物、氧化物、酸式盐和碱式盐的过程。
The addition of a small amount of metallic elements in pure aluminium would change its electrochemical activity, enhance its anticorrosive performance and decrease its negative differential effect.
向纯铝中加入少量金属元素，能改变铝的电化学活性，增强其抗腐蚀性能，减小负差效应。
Metallic elements such as Fe, Cu, al, Pb, Na, Zn, Sn and Cd etc. would influence the stability of grape wine.
影响葡萄酒稳定性的金属元素有铁、铜、铝、铅、钠、锌、锡和镉等。
Metallic elements such as Fe, Cu, al, Pb, Na, Zn, Sn and Cd etc. would influence the stability of grape wine.
影响葡萄酒稳定性的金属元素有铁、铜、铝、铅、钠、锌、锡和镉等。
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