zhè / xiàng / yán / jiū / guān / zhù / Sā / hā / lā / yǐ / nán / guó / jiā / de / liáng / shi / ān / quán / wèn / tí

这项研究关注撒哈拉以南国家的粮食安全问题。

This study focuses on food security issues in sub-Saharan countries.