Question

cardinal 【cardinal】adj.首要的，主要的Regular meals and exercise are of cardinal importance to our health.规律的饮食和运动对我们的健康是最首要的。

Accepted Answer

['kɑːrdɪnl] 
cardinala variable color averaging a vivid red
In Catholicism, a cardinal is a high-ranking bishop. In math, you use cardinal numbers to count. A cardinal rule is one that is central and should not be broken.
Okay, that's a lot of definitions. How exactly are they related? In all cases, cardinal means central or essential. It's a cardinal principle that you use it to describe words of behavior like rule or sin. In the Church, cardinals form the central governing body, and in math the cardinal numbers (one, two, three) are the numbers you learn and use first.
All forms of 'cardinal' will appear on average once every 187 pages.cardinalcardinalitycardinalship

Front	cardinal
Pron	['kɑːrdɪnl]
Back	【cardinal】 adj.首要的，主要的 Regular meals and exercise are of cardinal importance to our health. 规律的饮食和运动对我们的健康是最首要的。
Vocab	cardinala variable color averaging a vivid red In Catholicism, a cardinal is a high-ranking bishop. In math, you use cardinal numbers to count. A cardinal rule is one that is central and should not be broken. Okay, that's a lot of definitions. How exactly are they related? In all cases, cardinal means central or essential. It's a cardinal principle that you use it to describe words of behavior like rule or sin. In the Church, cardinals form the central governing body, and in math the cardinal numbers (one, two, three) are the numbers you learn and use first. All forms of 'cardinal' will appear on average once every 187 pages. cardinal cardinality cardinalship

Cardinal Numbers Central Rule Kɑːrdɪnl Adj.首要的，主要的 Regular Meals