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電子工学: electronics / 電子光学: electron optics
I am majoring in electronics at university.
demography
Demography is a part of social science that studies the structure, evolution, and problems of human population.
engineering department of a school
My younger brother will enter the engineering department next year.
Kyūjitai form of 人口学: demography
Demography is a branch of social science that studies the structure, distribution, and changes in human population.
fiber optics (US), fibre optics (UK)
He is an expert in fiber optics.
Kyūjitai form of 古気候学 (“palaeoclimatology”)
He is known as an expert in palaeoclimatology.
宇宙工学: astronautics
Astronautics is a field of study related to the exploration of space and the design of spacecraft.
機械工学: mechanical engineering
My major is mechanical engineering.
mechanical engineering
astronautics
He is majoring in astronautics.
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