后来，羽毛开始淡出人们的视野，因为金属笔尖出现了。这可谓是一个进步，因为用来写字的羽毛磨损得很快。
The feather went out with the introduction of a metal nib which was an improvement because skritching along with a feather tended to wear it out pretty quickly.
根据另一种理论，由于金属制造技术的进步，短剑不必再为保持它的强度而刻意造得那么短了。
Another theory is that as metalworking technologies advanced, the gladius no longer had to be short if it wanted to maintain its strength.
介绍了水口山有色金属集团有限公司近年来在金银生产的流程完善和技术进步方面所做的工作及取得的成效。
The paper presents the works done and success achieved by Shuikoushan Nonferrous Metal Group Corporation concerning the process perfection and technical progress in gold and silver production.
关于汽车构造基体金属的探讨，突出了现代铸铁的技术进步；
The discussion on base metals for auto construction pays special attention to technical advancement of modern cast iron.
与石器相比，用这种金属做成的工具和武器是一个巨大的进步。
Tools and weapons made of this metal are a great advance upon those made of stone or flint.
我们的现代社会的进步就会体现于这些里面，那究竟什么是金属酒店标牌？
The progress of our modern society will be reflected in the inside, then what is the metal hotel sign?
金属焊接和金属加工工艺的进步，对旧的金属铸造业产生了冲击。
Metal welding and metal processing technology advances, the old metal casting industry in the attacks.
随着物料和技术不断进步，我们已经可以利用钛金属制物质代替已坏死的牙根，这便是义齿种植了。
With the advent of dental materials and technology, we can replace a broken tooth root with a titanium root analogue, that is, dental implant.
随着物料和技术不断进步，我们已经可以利用钛金属制物质代替已坏死的牙根，这便是义齿种植了。
With the advent of dental materials and technology, we can replace a broken tooth root with a titanium root analogue, that is, dental implant.
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