ttb的翻译

In recent years there has been tremendous surge of interests in the development and demonstration of crystals with the structure of tetragonal tungsten bronze ( TTB).

近几十年来，人们对研究钨青铜结构的材料产生了浓厚兴趣并取得了很大进展。

Some developed countries not only have used TTB in a large amount in the trade field of the goods, but also have expanded TBT to service trade and investment field.

一些发达国家不仅在商品贸易领域中大量使用技术性贸易壁垒，而且还把技术性贸易壁垒扩展到服务贸易和投资领域。

Then, the paper points out two kinds of internal codes ( CNCC code and TTB code), and gives their definitions, and analyzes their performances.

然后，文章提出了两种全汉字集内部码（CNCC码和TTB码），给出了它们的定义，分析了它们的性能。