Onions are bulbs, which means they're mostly leaves around a modified stem that's evolved to swell up and store food for the plant during the winter months.

洋葱是鳞茎，这意味着它们主要是叶子围绕着一根经过改造的茎，茎在冬天的几个月里不断膨胀，为植物储存食物。