英语语法分析

Looking towards Berlin from their fastnesses in the Ruhr and southern Germany.

从德国的南部城市到鲁尔区的重要的经济地区再看向柏林。

The color fastnesses of these dyes were 4-5, and three of these dyes had high lightfastness of 6-7.

所有染料的色牢度均在4 ~ 5之间，有三个品种的耐光牢度达到了6 ~ 7级。

Disperse dyes are suitable for dyeing PU fiber, high uptake and satis factory fastnesses were observed.

分散染料是氨纶染色的理想染料，它具有较高的上染率和较好的染色牢度。