portion
单词辨析：
最普通用词，指物体、地区、事件、时间等的一部分或特征之一。
The front part of his car was washed.
他的车的前部已经清洗过了。
In parts of that country, people can speak at least two languages.
在该国的部分地区，人们至少会说两种语言。
Part of the profit will be donated to charity.
部分利润将捐给慈善机构。
The best part of the holiday was the skiing.
假期里最开心的事情就是滑雪。
指从较大物体上断裂或脱落的小块碎片，或谈话、新闻等的片段。
Police found several fragments of broken pottery.
警方找到了几片陶器碎片。
I heard a fragment of their conversation.
我听到了他们谈话的片段。
尤指某事物中可与其他部分区分开来的部分。
The front portion of the bridge collapsed.
桥的前段坍塌了。
A large portion of the property went to John.
很大一部分财产归了约翰。
Only a small portion of the budget was spent on food.
食物的花费只占预算的一小部分。
指物体、地方等划分出的部分，也可指结构、家具等整体中的部分。
Passengers are allowed to smoke only in the smoking section.
乘客只能在吸烟区吸烟。
There are two traffic police in the busy section of road.
交通繁忙的路段配备了两名交警。
The furniture they ordered was transported to them in sections.
他们订购的家具是分装运送的。
相关例句：
I took on a project that would change a large portion of my web forever.
我承担了一项将永远改变我大部分历史网的项目。
I had learnt a portion of the Koran
我学过一点儿《古兰经》。
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。
Prevents egress of the latter through the unsealed portion.
阻止后者通过未接合部分出来。
Only a portion of this system was allocated for this benchmark.
这个系统只有一部分被分配给这个基准测试。
Each child ate his portion.
每个孩子吃自己的一份食物。