theoretical knowledge without practical experience; Literally, “swimming lessons on a tatami floor”

“a hundred days of sermonizing, one fart” → a metaphor for how something that one has put great effort into can come to nothing after even a slight mistake, much as a hundred days of serious spiritual study can be lost to the winds

the National Aeronautics and Space Administration

United States Virgin Islands (an archipelago and dependent territory of the United States, part of the Virgin Islands in the Caribbean Sea)

Kyūjitai form of 対戦車砲

(Classical Japanese grammar) a verbal conjugation class which has the following inflections: -i/-i/-u/-uru/-ure/-i[yo]

(grammar) a verbal conjugation class in which the verb stem ends in -i and consists of four alternating bases: -i, -iru, -ire, and -iyo/-iro

Great works are performed by perseverance.

a levator palpebrae superioris

(anatomy) an obliquus capitis superior muscle