| 单词 | 水银 |
| 释义 | 水银 “ Pregnant women and mothers who are breastfeeding must not be allowed to work in a unit where mercury is present, ” states one official rulebook. Mercury, the fascinating liquid metal is not the only liquid metal. Mercury attracts gold like a magnet. Mercury has a much greater density than water. The mercury reads12 degrees outside, but it feels like minus2 with the windchill. Yet Greenpeace says that toxin levels in the sludge are much higher than the government admits, with arsenic at25 times the permitted amount, and significant levels of mercury and chrome. That applies not just to glass and plastics, but valuable or toxic substances such as gold, aluminium, nickel, copper, zinc, lead, cadmium and mercury, too. Do not eat shark, swordfish, king mackerel, or tilefishalso called white snapper, because they contain high levels of mercury. Besides water, the plume also contained carbon monoxide, carbon dioxide, ammonia, sodium, mercury and silver. But The Sunday Times found that in this remote corner of a poverty-stricken province, the European demand for mercury had brought the miners back. They inhaled toxic dust and vapours as the material seethed in primitive cauldrons to extract the mercury. In nearby areas, gold mining has released mercury into the air and water. Otherwise, mercury could be tracked around the building or home. And miners use blowtorches to burn off the bits of mercury that do find gold, infecting both the air and themselves. On the other hand, in the case of great health dangers of modern times — mercury, lead, tobacco, asbestos— journalists were too slow to blow the whistle. Sulfur atoms, which can bind poisonous mercury, coat each of the minuscule holes. Do you remember that the element mercury was used in the thermometers of your parents' generation, before digital thermometers were invented? Osram said it used the latest technology employing solid mercury to maintain high standards of industrial hygiene equivalent to those in Germany. LEDs, however, contain no mercury and already rival fluorescents in efficiency. Collect the powder as was done with mercury beads. The potential for litigation may be greatest in the ruined mountain landscape of Guizhou province in the southwest, where mercury has been mined for centuries. Here they endure long hours at dangerous jobs, wringing flecks of gold from the dirt with mercury. In Moscow, which has been my home town for four years, it's only hit minus30C once, in early2006, and the mercury rarely gets lower than anything a good, solid winter coat won't protect you from. Fluorescent lights use electricity to excite mercury vapour. This produces ultraviolet light that causes a phosphor coating inside the bulb to glow. Those bulbs also contain tiny amounts of mercury. Making the bulbs requires workers to handle mercury in either solid or liquid form because a small amount of the metal is put into each bulb to start the chemical reaction that creates light. Capital can move like mercury. |
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