検索内容:
quick, rapid
I was surprised at his quick progress.
quickness, rapidity
I am surprised at the quickness of this project's progress.
come down, decrease, fall, diminish, lessen, recede, wane
The population is coming down.
reduction, decrease, fall, decline
The population is rapidly decreasing.
population
The population of Japan is decreasing.
Kyūjitai form of 人口学: demography
Demography is a branch of social science that studies the structure, distribution, and changes in human population.
demography
Demography is a part of social science that studies the structure, evolution, and problems of human population.
census
The next census will be conducted next year.
population density
Tokyo is the city with the highest population density in Japan.
a population pyramid
Looking at the population pyramid, you can see that this country is aging.
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