亜酸化窒素: nitrous oxide

each person

(mechanics) statistical mechanics

疾う: quickly, swiftly

灯: electric lights / 投: pitches / 棟: buildings / 等: / 頭: heads of large animals (cows, horses)

刀: a sword, a katana; a scalpel, such as that used by a surgeon; a kind of bronze or copper money in ancient China, shaped a bit like a sword / 灯: electric light / 当: / 投: / 豆: / 党: political party

杜宇:

当: this (business or place)

東: a surname / 唐: Tang dynasty, which ruled China from 618 to 907 / 湯: / 藤: a surname

等: et cetera, and so on / 島: island