fundamentals

US /ˌfʌn.dəˈmen.t̬əlz/
UK /ˌfʌn.dəˈmen.t̬əlz/
1.

cơ bản

a central or primary rule or principle on which something is based.

:
two courses cover the fundamentals of microbiology
2.

cơ bản

a fundamental note, tone, or frequency.