ue"), 10); scores.insert(String::from("Yellow"), 50); let team_name = String::from("Blue"); let score = scores.get(&team_name).copied().unwrap_or(0); 示例 8-21：访问哈希 map 中储存的蓝队分数 165/562Rust content: String::from( "The Pittsburgh Penguins once again are the best \ hockey team in the NHL.", ), }; println!("New article available! {}", article.summarize()); String::from( "The Pittsburgh Penguins once again are the best \ hockey team in the NHL.", ), } } else { SocialPost { username: St