| 词汇 | fastness |
| 释义 | fastness noun uk/ˈfɑːst.nəs/ us/ˈfæst.nəs/ (FIXED) [ U ]牢固性；不褪色性 how fast (= fixed) something is Test clothes for colour fastness before washing. 清洗前要检查衣物是否褪色。 (SAFE PLACE) [ C ] literary要塞，堡垒 a safe place, such as a fortress a mountain fastness 山间要塞 |
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