无叶的

So, at present numerous work mainly focuses on the finding of the new activators to improve the erosion. The new activators are referred to as the rare-earth metal oxide instead of the thoria.

因此迄今为止，国内外的研究主要集中在采用稀土氧化物取代传统ThO〓添加剂，试图利用它们的热物性差别来提高迁移能力，但收效不大。

Most of the marathon open flat track Zheng Bian fast-track 100 meters wide, two-way fast lane 10, the author flat straight road, the marathon is the best track, the most beneficial to create a cum laude players.

郑汴快速通道宽100米，双向十个快车道，道路平坦笔者直，是最理想的马拉松赛道，最利于选手创造出优异成绩。