27Local economists have looked into their crystal balls and viewed something instead nasty.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》

杂质、裂纹越少越好。质地好的水晶制品，应看不到星点状、云雾状和絮状分布的气液包裹体或组成玉石的颗粒。有裂纹、斑点，则属于次品。

发晶的价值取决于发的颜色、罕见性及大小，一般是发色鲜艳、块度大的价格高。水胆水晶的价值主要取决于水胆及晶体的大小、透明度的高低。如果水胆较大并有一定形态，便可加工成较为珍贵的工艺品。另外水胆中的水也有一定的科学研究价值，通过它们可了解几百万年前地球上水的成分及变化。

We've prepared about around three hundred stones while in the mineral kingdom! Examine each stone's distinctive origin, history, and energies underneath.

2She was carrying a strand of crystal beads.她戴着一串水晶珠子。《柯林斯英汉双解大词典》

They may sooner or later generate a nice minor uniform cluster of atoms, This really is the whole process of developing crystals. The more they are able to occur alongside one another, the greater of a formation will likely be noticeable into the bare eye. Scientists can decide what mineral They can be considering by how the crystals form.

时尚的收藏爱好者喜欢收藏天然水晶，却常常因为在市场上面对大量的合成水晶看走了眼。市面上的水晶：

1A crystal chandelier lit the home.一盏水晶吊灯照亮了房间。《柯林斯英汉双解大词典》

Q.4. What's the distinction between atomic composition and crystal construction? Ans. The first distinction between atomic structure and crystal construction lies in their definitions: atomic structure refers to how atoms are arranged within a single molecule or simply a cluster of molecules, whereas crystal construction fears the precise arrangement of atoms inside a solid substance.

22Working from what America by here now appreciates about alone, the bureau's experts and also other demographers offer you an irresistible, if clouded, crystal ball amongst their visions.

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 only some various unit-mobile designs, so a number of crystals share just one unit-mobile sort. An essential characteristic of a device cell is the volume of atoms it has. The entire range of atoms in your entire crystal will be the amount in Every single mobile multiplied by the number of device cells. Copper and aluminum (Al) Each and every have a single atom per device cell, even though zinc (Zn) and sodium chloride have two. Most crystals have just a few atoms for each device cell, but there are many exceptions. Crystals of polymers, by way of example, have A huge number of atoms in Each and every unit cell.

⑨、喷砂：立体感弱，较平整，无凹凸感，机器雕刻文字、图形等后进行效果处理。成本低制作快。

21You all understand how when you have a crystal prism and pass a beam of daylight via it, you get a spectrum, which looks like a continual band of rainbow colours.