n.牢固；不褪色；要塞；巩固；堡垒；迅速
fatness───n.肥胖，油腻；肥沃
gastness───n.恐惧
pastness───n.过去性；不复存在
vastness───n.巨大；广大；广漠
wastness───浪费
fastnesses───n.牢固；不褪色；要塞；巩固；堡垒；迅速
faintness───n.模糊；微弱；衰弱
fasteners───n.[机]紧固件；扣件；按钮配件；系结物（fastener的复数）
firstness───第一性
The bandits withdrew to their mountain fastness for the winter.───盗匪们撤回到他们的山寨中准备过冬。
They could have withdrawn into the mountain fastness of Eryri.───他们本来可以撤回到艾瑞的山区要塞里。
We guarantee the fastness of these dyes.───我们担保这些染料不褪色。
Surrounded by mountains that were impassable for most of the year, it was "a fastness hard for a foreign foe to make his way into. "───由于被在一年的大多数时间里都不能通行的山脉所围绕，事实上这是“很难为外部敌人侵入的堡垒。”
GRAPHIC TECHNOLOGY. PRINTING, PRINTING INKS AND SUBSTRATES. EVALUATION OF LIGHT FASTNESS BY MEANS OF A XENON LAMP.───印刷工艺.印刷、印刷油墨和印刷受体.氙弧灯评定颜色耐光牢度
Generally lighter than the color of the fabric of better color fastness, not easy to fade, do a staining.───一般颜色较浅的面料的颜色牢度较好，不易褪色，也不易沾色。
Among the white pigments, precipitated silica had the best light-fastness performance, while titanium dioxide fared the worst.───白颜料中以沉淀型矽士对耐光性最有利，最差的是二氧化钛；
The result of the computer simulation experiments shows the validity and fastness of this algorithm.───计算机仿真实验的结果表明该算法的有效性和快速性。
To improve color fastness, disperse dyeing is usually followed by reduction clearing.───为提高色牢度，在分散染料染色后要进行还原清洗。
Who knows? In our North London fastness we are as ignorant as snowflakes of such matters.
Light fastness of anthraquinone dyes was affected by many factors and it was mainly determined by dye structures, such as the kinds and position of substituent groups, dipole moment of the molecule.
To common joints, bolts fastness should start from center to outside.
We guarantee the fastness of these dyes.
Test clothes for colour fastness before washing.
In our North London fastness we are as ignorant as snowflakes of such matters.
Silk fabrics have a slightly lower color fastness and may fade in sunlight.
They could have withdrawn into the mountain fastness of Eryri.
Turntable fastness ,[Sentencedict] replacing simply and convenient.