The fundamentals of something are its simplest, most important elements, ideas, or principles, in contrast to more complicated or detailed ones.
例句
...teaching small children the fundamentals of road safety...教给小孩子交通安全的基本规则They agree on fundamentals, like the need for further political reform.他们在需要深化政治改革等基本问题上意见一致。
英英词典释义
Noun
1. principles from which other truths can be derived;
"first you must learn the fundamentals""let's get down to basics"