1. 名詞
   不可數名詞: 快速的樣子
   迅速的樣子
   急速的樣子
   堅牢度, 堅牢性
   色耐度, 不褪色性
   不褪色度
   堅韌度
   牢固, 鞏固
   固定性, 固著性
   可數名詞/
   

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   同義字詞
   celerity,fleetness,haste,hurry,quickness,rapidity,rapidness,speed,speediness,swiftness,velocity
   bastion,castle,citadel,fort,fortification,fortress,hold,redoubt,stronghold
   adhesion,allegiance,attachment,commitment,constancy,dedication,devotedness,devotion,faith,faithfulness,fealty,fidelity,loyalty,piety,steadfastness,troth
   

例句

1. It was a sort of fastness .
2. What is the cause of fastness ?
3. Test the paper first for colour fastness .
4. It is a backlash against the fastness of recent years .
5. Zeroxy also has excellent light, washing, and crocking fastness .
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