An Unbiased View of Crystal
An Unbiased View of Crystal
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27Local economists have appeared into their crystal balls and seen some thing instead awful.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》
③、粗抛光：是将模具压出之毛胚，以金刚石盘直接磨出成品之刻线。④、细抛光：在粗抛光之后，以抛光粉来磨成品至晶莹剔透为止。
4Without a crystal ball, It truly is unachievable to convey where by we'll be subsequent 12 months.不用水晶球预卜未来，我们说不准明年处境如何呀。《牛津词典》
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You will find numerous crystals dependant upon geometric constructions, crystal progress, and substance. There might be preparations of hexagonal carbon atoms or amethyst which makes hexagonal pyramid structures.
你们都知道，拿起一个水晶棱镜，让一束阳光通过它，就会得到一个光谱，看起来就像一条连续的彩虹色带。
30Three days went past, and I was shocked to view it once more: many of the openings ended up sewed up by skinny and white thread they usually looked similar to the ice crystal on winter's branches in the north.
Ionic Crystals: Electrostatic forces form ionic bonds. A classic instance is actually a halite or salt crystal.
Q.four. What's the difference between atomic structure and crystal framework? Ans. The principal distinction between atomic composition and crystal construction lies in their definitions: atomic construction refers to how atoms are arranged inside of a one molecule or even a cluster of molecules, Whilst crystal construction concerns the particular arrangement of atoms within a reliable material.
A crystal system refers back to the website classification of crystals dependant on the geometric arrangement and symmetry in their lattice constructions. You will discover seven principal crystal methods:
There are 2 these doable periodic preparations. In Each and every, the 1st layer has the atoms packed right into a aircraft-triangular lattice in which every atom has six quick neighbours. Determine two reveals this arrangement with the atoms labeled A
正常的水晶在生长时，多可以发现和柱形尖端棱线平行的生长纹（expansion lines）。由于在地底、岩洞中的生长空间多狭窄，尤其在遇到地震时，或地壳变动时，甚至容易遭到其他矿石的挤压，常常会压迫产生不同的「晶面」。还有，当水晶还是在液态状的时候，常常也会包覆着其他的矿石、泥灰一起结晶成长，如金红石（稍后变成发晶）、火山泥灰（稍后变成幻影水晶）等等。所有的这些，都是「自然的一部分」，请不要视为「瑕疵」。
14For instance, We've Quartz crystal clocks and watches exact to in one particular minute a 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。
Wise Vocabulary: linked words and phrases Geology: mineralogy beneficiation crystalline deposit gemologist gemology gold dust graphite idiomorphic intercrystalline like gold dust idiom magnesium mineral nugget pyrite quasicrystal seam silicon unmined vermiculite vulcanicity See a lot more benefits » You may as well obtain relevant words and phrases, phrases, and synonyms while in the topics: