Applied
来自Big Physics
late Middle English: from Old French aplier, from Latin applicare ‘fold, fasten to’, from ad- ‘to’ + plicare ‘to fold’.
etymonline
applied (adj.)
"put to practical use," (as opposed to abstract or theoretical), 1650s, from past participle of apply. Earlier it was used in a sense of "folded" (c. 1500).
