Facts About Crystal Revealed
Facts About Crystal Revealed
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27Local economists have seemed into their crystal balls and viewed a little something alternatively terrible.当地的经济学者们已预测到将会出现棘手的问题。《柯林斯英汉双解大词典》
⒉棉、云雾或渣状包裹体、杂质在透明水晶内部有雾蒙蒙的现象或是感觉里面像有棉絮状、渣状物质一样的包裹体，这些包裹体的存在，影响水晶的整体美观。还有的水晶内局部含有黑斑或其他颜色的斑状物质，与水晶整体不协调，被视为水晶的杂质，有这种杂质的水晶是次品。
These improvements consist of unique structures with programmable lattice symmetries and well-defined crystal behavior, responsive supplies that leverage the intrinsic Attributes of nucleic acids to manipulate constructions on need, nanoparticle superlattices developed epitaxially from surfaces and colloidal crystals which offer insights into light-weight–subject interactions. On the lookout forward, we challenge the Group to leverage the remarkable structural Regulate afforded by crystal engineering with DNA to synthesize courses of purposeful products that press beyond what is attainable with naturally developing crystalline elements or those produced by much more common procedures.
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2She was putting on a strand of crystal beads.她戴着一串水晶珠子。《柯林斯英汉双解大词典》
Not all crystals variety in water, but nearly all crystals variety exactly the same way, atoms appear together and turn into a uniformed cluster. The method normally takes as very little as a few days to probably a thousand yrs. Normal crystals that originate from the Earth kind the same way.
对任何宝石来说，颜色都是非常重要的，水晶也不例外。如果是水晶晶体是有颜色的，如粉水晶、黄水晶、紫水晶等，其颜色评价的最高标准则是明艳动人，不带有灰色、黑色、褐色等其他色调。如粉水晶，颜色以粉红为佳；紫水晶，要求颜色为鲜紫，纯净不发黑；黄水晶，要求颜色不含绿色、柠檬色调，以金橘色为佳。对于发晶来说，晶体的颜色也是很重要的。相同发丝的金发晶，晶体完全无色（白水晶）和晶体略偏茶色，肉眼的视觉观感也是有差别的，所以前者的价格会高于后者。
损伤是指水晶由于加工或不小心摔掉、碰撞等原因，人为造成的损坏。它可以是破口，也可以是凹坑等。
Q.four. What is the distinction between atomic construction and crystal composition? Ans. The key difference between atomic structure and crystal framework lies in their definitions: atomic framework refers to how atoms are structured inside a solitary molecule or perhaps a cluster of molecules, Whilst crystal construction problems the precise arrangement of atoms inside of a sound compound.
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地质学家目前为止对晶洞形成还没有广泛认同的理论，但相信晶洞可以在任何埋藏的空腔内形成。这些空腔可以是火成岩中的气泡、树根下的空穴，甚至动物挖的地洞。经过漫长时间，空腔的外壁变硬，溶解的矽酸盐或方解石沉积到内壁。再经过漫长的时间，缓慢渗入的矿物使得晶体在空腔内部结晶。
You can find other minerals and molecules that can kind these crystal lattices. Snowflakes are a typical example of a about symmetric more info and geometrically patterned framework from ice crystals, and gemstones of all types are generally crystals.
14For instance, Now we have Quartz crystal clocks and watches accurate to in a person moment a calendar year.例如，我们使用的每年误差不超过1分钟的石英水晶钟表和手表。
Another sort of crystalline carbon is based on a molecule with 60 carbon atoms identified as buckminsterfullerene (C60). The molecular condition is spherical. Each carbon is bonded to a few neighbours, as in graphite, as well as spherical condition is realized by a combination of twelve rings with 5 sides and twenty rings with 6 sides. Comparable structures had been very first visualized via the American architect R. Buckminster Fuller for geodesic domes.