suí / zhe / yì / miáo / pǔ / jí / xiǎo / ér / má / bì / zài / xǔ / duō / guó / jiā / yǐ / jīng / hěn / shǎo / jiàn / le

随着疫苗普及，小儿麻痹在许多国家已经很少见了。

With widespread vaccination, polio has become rare in many countries.