一、基本含义
portion 是一个英文名词，主要表示“一部分”、“一份”或“份额”，常用于描述整体中被分配或指定的部分。
二、常见用法
- a portion of + 名词：表示“……的一部分”
例：She ate only a small portion of the cake. - one's portion：某人应得的份额
例：Everyone received their fair portion of the inheritance. - portion out（动词短语）：分配，分发
例：The teacher portioned out the worksheets to the students.
三、例句精选
- Each student was given an equal portion of time to present.
- The restaurant serves generous portions at reasonable prices.
- Only a small portion of the budget is allocated to research.
- He saved the larger portion of his salary for retirement.
四、portion 与 part 的区别
虽然 portion 和 part 都可表示“部分”，但有细微差别：
- portion 强调“被分配出的、可计量的一份”，通常用于食物、财产、时间等可分割的事物。
- part 更泛指“整体中的任意组成部分”，不一定强调分配或数量。
例如：
✅ I ate a large portion of rice.（强调“一份饭”）
✅ This is an important part of the machine.（强调“组成部分”）