先進国: advanced country, developed country

潜水艦: submarine

Eye dialect spelling of 先生 (sensei), representing the speech of a schoolchild, especially as a vocative before a question.

Short for 日曜日 (nichiyōbi): Sunday

ordinal day of a month / number of days

sun / day

the sun / sunlight, sunshine / daytime, daylight / a day / time and date / a daily (something done everyday) / the weather / a (usually unfortunate) case, event, situation

daytimes / number of days

Alternative form of 日除け

day / sun