Fastness
01
速度, 快速
a rate (usually rapid) at which something happens
02
堡垒, 要塞
a strongly fortified defensive structure
语法信息
有生性状态
无生命
形态构成
复合词
可数
复数形式
fastnesses
03
固定性, 牢固性
the quality of being fixed in place as by some firm attachment
速度, 快速
堡垒, 要塞
固定性, 牢固性
