X Factor
freq. 16
dict. 5
cmpt. 1
spoken 4
n.X 因素（尤指获得成功所必需又难以描述的素质）
[网络]英国偶像；未知因素；未知元素
- sound recordings books, postcards
- sound-recording system
- sound recording system
- sound recording volume indicator
- sound recordist
- sound records
- sound reduction factor
- sound reduction index
- sound-reflecting means
- sound reflection
- sound-reflection
- sound reflection board
- sound reflection coefficiency
- sound-reflection coefficient
- sound reflection coefficient
- sound-reflection factor
- sound reflection factor
- sound reflection pattern
- sound reflections
- sound reflectivity
- sound reflector
- sound refraction
- sound registering
- sound regulation room
- sound reinforcement