fastnesses是什么意思？

fastnesses

• n. 牢固( fastness的名词复数 )，固定，要塞，堡垒；

例句

• 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.

柯林斯高阶英汉双解学习词典释义

• N-COUNT
  堡垒;要塞
  A fastness is a place, such as a castle, which is considered safe because it is difficult to reach or easy to defend against attack.
  例句
  They could have withdrawn into the mountain fastness of Eryri. 他们本可退到山中要塞埃利里去。