An Unbiased View of Crystal
An Unbiased View of Crystal
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其它描述：《庶物异名疏》中说： �?水精出大秦国，一名黎�?�?。结晶完整的水晶晶体，就如参差交错的马齿，所以人们又叫它马牙石。先民们最早用它研磨成眼镜片，因而送它一个眼镜石的绰号。水晶有通称，也有俗称。广州一带称水晶叫晶玉，又名鱼脑冻；江苏东海县山民发现水晶会 �?窜火�?�?，于是给它起个放光石的俗名。世间一物多名，不足为奇，而像水晶拥有这么多的别称，实不多见。瞧，从水玉、水碧、白玉、玉瑛、水精石英、黎难、晶玉到菩萨石、马牙石、眼镜石、放光石、千年冰、高山冻、鱼脑冻等等，简直构成一部奇石鉴赏史。
无色水晶以晶莹美丽、洁净透明着称。衡量无色水晶主要看它的纯度，越纯、越透明越好。干净的、无瑕疵的、杂质少的价值就高。无色的水晶如果很脏，就没有利用价值。
一般而言，紫晶和黄晶是水晶中价值较高的品种。两者进一步的分级是据其颜色的深浅，颜色较深的为A级，稍浅的为B级。一般颜色较深的价格高，但要以不深暗为标准。颜色包括两种，一种是水晶本身的颜色，另一种是内部包裹体的颜色。水晶本身的颜色要艳丽、纯正，分布要均匀，不能太深或太浅，如澳州玉、蓝玉髓、紫晶、黄水晶，其价格就高。无色的水晶内含包裹体的颜色艳丽，其价格也高，如钛晶、绿幽灵、红兔毛。紫水晶一般以稍有云状物、颜色深紫、晶体通透的为上品。
Fig. seven: A template-directed approach can Management the placement of developing blocks over a surface inside the formation of complicated buildings.
2She was donning a strand of crystal beads.她戴着一串水晶珠子。《柯林斯英汉双解大词典》
结晶�?When sea water is permitted to evaporate, salt crystals are deposited. 海水蒸发后，盐的结晶体就沉淀下来。
Crystals search distinctive from many other rocks and minerals, but �?barring a handful of Specific situations �?nearly all minerals conceal a crystalline composition beneath the floor.
There's a equivalent directive about crystal glass which differentiates between whole lead crystal, direct crystal and crystal.
13Nearly all computer systems comprise a quartz-crystal clock to manage their operation.几乎所有的计算机都有一个石英晶体时钟来调节它们的运行。
The definition of the good seems evident; a solid is normally regarded as getting tricky and agency. On inspection, on the other hand, the definition gets considerably less clear-cut. A cube of butter, as an example, is hard immediately after being stored within a refrigerator and is also Plainly a stable. Right after remaining to the kitchen area counter for per day, precisely the same cube gets pretty smooth, and it is unclear In the event the butter must still be deemed a solid.
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 will discover other minerals and molecules that may form these crystal lattices. Snowflakes can be a vintage example of a about symmetric and geometrically patterned framework from ice crystals, and gemstones of all kinds are generally crystals.
This Critique chronicles about 20 years of investigate into creating a genetic code for crystal engineering. In lieu of directing Organic procedures, this code works by using synthetic varieties of DNA to programme the assembly of nanoparticles and microparticles into 1D, second and 3D crystalline architectures, in which nearly each aspect of the resultant structures could be systematically controlled. In this conceptual framework, the structural and useful advancements are described in an effort to outline the current level of sophistication and to predict long run Instructions in the platform.
crystal Alteration is variable: absent in many crystals, in others producing dense sericite aggregates which may show some recrystallization results to make coarser-grained white mica. With the Cambridge English Corpus The tridymite crystals are rectangular or wedge-shaped and are sometimes arranged in aggregates. Through the Cambridge English Corpus Additionally, haloarchaeal cells were embedded in just salt crystals beneath laboratory problems and subsequently analysed by gentle microscopy. From your Cambridge English Corpus The white clouds (typically sparse) ended up also broadly considered getting made up of small crystals of water ice, instead like cirrus inside our atmosphere. Through the Cambridge English Corpus They are found in evaporite salt lakes and will be trapped in salt crystals in the course of evaporation. From your Cambridge English Corpus Consequently, the cells (organelles and membranes) are wrecked mechanically by ice crystals, leading to Demise through mobile lysis. From your Cambridge English Corpus The crystals ended up Employed in the main or 2nd orders of reflection. With the Cambridge English Corpus Within our 8xperiments, the crystals had been cubes which has a foundation place of here eight e mm. In the Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : impact of temperature and strain.