“…When we talk about "those young students are tall", we should know the individual feature data of all students, for example, 185), (25,190), (26,184), (26,170), (27,187), (27,188) (28,160), (30,190), (32,185), (33,176), (35,185), (36,188) (38,164), (38,178), (39,182), (40,186), (42,165), (44,170) (10.5) whose elements are ages and heights in years and centimeters, respectively. When we talk about "those young students are tall", we should know the individual feature data of all students, for example, 185), (25,190), (26,184), (26,170), (27,187), (27,188) ...…”