The Basic Principles Of Crystal
The Basic Principles Of Crystal
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27Local economists have appeared into their crystal balls and viewed anything rather 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》
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对水晶进行评价主要依据其颜色、透明度、大小、净度、特殊图案及是否有光学效应等方面。以颜色纯正，浓度较高，内部无瑕为好。种类上紫晶最贵，其次为黄晶、烟晶、无色水晶和芙蓉石。有特殊光学效应的水晶的价格更高。
The purchased inner framework of huge crystals, just like the fluorite and quartz proven here, is mirrored within their geometric styles.
条痕颜色：无色。矿物粉末的颜色叫条痕。它可以消除假色，减弱他色，保留自色，是比矿物的颜色更为可靠的鉴定特征之一。
Lattices may have a person lattice point for every mobile or more than one, yielding a complete of fourteen Bravais crystal lattice types. Bravais lattices, named for physicist and crystallographer Auguste Bravais, describe the a few-dimensional array created by a list of discrete details.
Increase to word list Add to word checklist [ C/U ] clear rock that looks like ice, or simply a piece of it
11I very carefully opened the bundle and located a crystal bell within.我小心地打开包裹，发现里面有一个水晶钟。
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The definition of a good seems clear; a strong is normally considered staying really hard and company. On inspection, nonetheless, the definition gets to be fewer uncomplicated. A dice of butter, by way of example, is difficult after getting saved in the refrigerator and is particularly clearly a good. Immediately after remaining around the kitchen area counter for on a daily click here basis, exactly the same dice becomes very comfortable, and it truly is unclear If your butter really should still be deemed a good.
There's two this sort of achievable periodic preparations. In Each and every, the main layer has the atoms packed right into a airplane-triangular lattice in which each atom has 6 fast neighbours. Determine two displays this arrangement with the atoms labeled A
Orthorhombic: These are generally rhombic prisms and dipyramids that resemble tetragons but without square cross-sections.
玉石纹理如果能形成美丽的花纹、图案，其价格就高，如玛瑙内红白相间的色带有规律地排列，形成缠丝玛瑙时，碧玉中的不均匀颜色形成一种风景图案时，材料的价值将提高。当水晶内包裹体形成美丽的图案时，如幽灵水晶、风景水晶，或者针状包裹体呈束状排列时，其价值都高于普通的水晶。图案越美观、越有意境越好。
crystal Alteration is variable: absent in several crystals, in Other folks generating dense sericite aggregates which can exhibit some recrystallization results to generate coarser-grained white mica. From your Cambridge English Corpus The tridymite crystals are rectangular or wedge-formed and are occasionally organized in aggregates. From the Cambridge English Corpus Also, haloarchaeal cells ended up embedded within salt crystals less than laboratory situations and subsequently analysed by mild microscopy. With the Cambridge English Corpus The white clouds (ordinarily sparse) ended up also commonly regarded as becoming composed of small crystals of h2o ice, fairly like cirrus within our environment. From the Cambridge English Corpus These are found in evaporite salt lakes and will be trapped in salt crystals for the duration of evaporation. Through the Cambridge English Corpus Thus, the cells (organelles and membranes) are wrecked mechanically by ice crystals, bringing about Dying by means of mobile lysis. From the Cambridge English Corpus The crystals had been Utilized in the very first or 2nd orders of reflection. In the Cambridge English Corpus In our 8xperiments, the crystals ended up cubes using a foundation space of 8 e mm. Within the Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : influence of temperature and force.