When extended to five dimensions, it becomes a "black string," and unlike a normal 4d black hole, it is unstable (this ignores the fact that 4d black holes eventually evaporate).
The studies on occupation quality of teachers give the information about the operational definition and dimensions of work temperament of normal university students.
从教师职业素质出发提出高师生职业气质的操作性定义和维度构想；
3
Ideal for general pieces of various dimensions with normal operating air gaps and medium thicknesses and for use in table configurations.