英汉词典

1. 部分
    A portion of something is a part of it.

portion的意思

    e.g. Damage was confined to a small portion of the castle...
           城堡仅有一小部分受损。
    e.g. I have spent a fairly considerable portion of my life here...
           我生命中相当长的一段时光是在这里度过的。

2. （饭菜的）一份，一客
    A portion is the amount of food that is given to one person at a meal.

    e.g. Desserts can be substituted by a portion of fresh fruit...
           餐后甜点可以用一份新鲜水果代替。
    e.g. The portions were generous.
           每份饭菜分量都很足。