Demographer
[diː'mɒɡrəfə] or [dɪ'mɑgrəfɚ]
解释:
(noun.) a scientist who studies the growth and density of populations and their vital statistics.
丹尼斯编辑--From WordNet
[diː'mɒɡrəfə] or [dɪ'mɑgrəfɚ]
(noun.) a scientist who studies the growth and density of populations and their vital statistics.
丹尼斯编辑--From WordNet