a round vegetable with many layers inside each other and a brown, red or white skin. Onions have a strong smell and flavour.

• 一种圆形的蔬菜（a round vegetable）
• 有许多层在里面（with many layers inside each other）
• 有棕色、红色或白色的皮（and a brown, red or white skin）
• 洋葱有强烈的气味和味道（ Onions have a strong smell and flavour.）

人教精通版小学《英语》