corundum

corundum的音标为[ˈkɔːrɪndəm] ，基本翻译为“刚玉”，速记技巧为：硬（cor）玉（nu）是刚玉。

Corundum的英文词源可以追溯到拉丁语“corundum”或“corunda”，意为“磨石”。这个词源于古罗马时期，用于描述一种用于研磨和抛光的天然矿物。

变化形式：

名词形式：corundum、corundumite

形容词形式：corundal

相关单词：

ruby：红宝石，源于拉丁语“rubius”，意为红色，与corundum的来源有关，因为红宝石常被用作研磨材料。

corundumite：一种含铝的氧化物矿物，与corundum同源，也用于研磨材料。

corundometer：研磨计，一种测量研磨效果的仪器。

corundum-coated：涂有刚玉涂层的。

corundum-faced：具有刚玉表面的。

corundum sandstone：刚玉砂岩。

corundum scale：磨料斑痕，指在金属表面形成的刚玉颗粒沉积。

corundum grinding wheel：刚玉砂轮，一种常用的研磨工具，由磨料和结合剂制成，表面涂有或镶嵌有刚玉颗粒。

corundum-tipped：尖端镶嵌有刚玉颗粒的。

以上这些单词都与corundum有着密切的联系，描述了其不同的应用和形态。

常用短语：

1. corundum in the rough 未加工的刚玉

2. corundum in crystal 晶体刚玉

3. corundum in the form of powder 刚玉粉末

4. corundum in the form of a crystal 刚玉晶体

5. corundum in the form of a powder 刚玉粉

6. corundum in the nature of a gemstone 宝石级刚玉

7. corundum in the form of a paste 刚玉浆

双语例句：

1. The rough corundum is polished to create a beautiful gemstone.

未加工的刚玉经过打磨成为美丽的宝石。

2. The crystal corundum is used for high-precision optical lenses.

晶体刚玉用于制造高精度的光学镜头。

3. The powder corundum is used in the production of ceramic materials.

刚玉粉末用于生产陶瓷材料。

4. The paste corundum is used for making abrasive tools.

刚玉浆用于制造磨削工具。

5. Corundum is a hard and durable gemstone that is highly prized by collectors.

刚玉是一种硬度和耐用性都很高的宝石，深受收藏家们的喜爱。

6. The color of corundum varies from colorless to deep red, making it a versatile gemstone.

刚玉的颜色从无色到深红色不等，使其成为一种多功能的宝石。

7. Corundum is commonly found in nature and is used in various applications, from jewelry to industrial tools.

刚玉在自然界中很常见，被用于各种应用，从珠宝到工业工具。

英文小作文：

Corundum: The Sturdy Gem of Nature

Corundum, a hard and durable gemstone, is a common occurrence in nature and is prized for its beauty and versatility. From colorless to deep red hues, corundum comes in various shades that add a touch of elegance to any ensemble.

Whether worn as jewelry or used in industrial tools, corundum remains resilient and long-lasting, making it a must-have gemstone for collectors and wearers alike. Additionally, corundum is known for its resistance to scratches and wear, ensuring that it retains its luster for a long time.

Moreover, corundum is used in the production of high-precision optical lenses, which makes it an essential component in various technological devices. From cameras to microscopes, corundum-based lenses contribute to the advancement of science and technology.

In conclusion, corundum is a versatile gemstone that can be found in various forms and shades, making it an ideal choice for both fashionistas and collectors alike. Its durability, beauty, and versatility make it a gemstone that never fails to captivate.