宝石琢磨

The study of gems.A precious or semiprecious stone that may be used as a jewel when cut and polished.

半宝石一种珍贵的或稍次一些的石头，经过琢磨或抛光后可当珠宝使用

In 1714, Louis XIV commissioned the court jeweller to recut the Tavernier Blue, resulting in a 69.03 carat stone. He only wears it once before smallpox claimed him.

1714年，路易十四将这颗蓝色宝石琢磨成69.03克拉的钻石，可就是这颗令其爱不释手的钻石，路易十四仅戴了一次就患上了一次当时的流行病——天花而死去。

However, he was subject to strife of other senior artisans. Claude Miniyaer did not give up his enthusiasm to research on jewelry craft. Minister Mazarin called on artisans to try for new gem polishing method. Most craftsmen held the traditional concept of polishing most precious gold and pearl jewelry, while Claude Miniyaer had realized the importance of the trial and joined with several craftsmen to research on combing different gem polishing ways. By working out a new gem cut-rose cut, they discovered unique features of diamonds, thus started the diamond era.

克洛德·米尼亚尔并未因此而放弃对首饰制作的热心钻研，当路易十四的朝廷大臣马萨林征集工匠试验新的宝石琢磨法时，大部分工匠还只停留在对传统观念中最贵重的黄金和珍珠首饰大加修饰之上，克洛德·米尼亚尔却感觉到了试验的非比寻常，他恳请加入其中，和另几位工匠开始对宝石进行不同刻面相结合琢磨法的尝试，他们的努力发掘了钻石从未被发现的特性，于是，宝石玫瑰形琢磨法问世了，一个大放异彩的钻石时代也就从这里开始。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。