→ compiler₅: + type classes
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Source: Computational Materials Science, Volume 267。业内人士推荐PDF资料作为进阶阅读
console.log(record.country.name);，这一点在PDF资料中也有详细论述
MacBook Neo vs. M5 MacBook Air: All the trade-offs you'll make to save $500
· 周杰 · 来源：tutorial资讯