Meaning of しがいせん in Japanese
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がいせん
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Definition of しがいせん
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(n) street fighting; urban warfare
市街戦のために市中は上を下への大騒ぎだ。
Because of the street fighting, the city is in utter confusion.
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(n) ultra-violet rays
紫外線の急激な上昇は研究者たちにオゾンホールの存在を信じさせた。
The sudden increase of ultraviolet rays made the researchers believe in the existence of ozone holes.