expand upon

expand upon的音标为：[ɪk"spænd] ，意思是：详述。

速记技巧：可以记成“先分再分”（expand的首字母和分词的首字母）。

Expand upon这个词组的英文词源是“expand”和“upon”，意思是“在...上加以扩展”。

expand这个词的词源可以追溯到古英语时期，其原始含义是“扩大，扩张”。它的变化形式包括过去式“expanded”，过去分词“expanded”，现在分词“expanding”和形容词“expandable”。

upon这个单词在英语中经常用作介词，表示“在...上”。

相关单词有：

1. Expansion - 扩展，扩大，扩张。这个词在英语中很常见，可以用于描述物体或想法的扩大或扩张。

2. Exponent - 指数，指数函数。这个词来源于拉丁语，表示指数的数量或幂。

3. Infinite - 无限的。这个词来源于拉丁语，表示没有边界或限度的。

4. Contraction - 收缩，紧缩。这个词来源于拉丁语，表示物体缩小或收缩。

5. Dilation - 膨胀，扩张。这个词来源于拉丁语，表示物体变大或扩张。

以上这些单词都与expand upon这个词组有关，并且描述了物体或概念在空间或数量上的变化。每个单词都有不同的词源、变化形式和相关的使用语境。

常用短语：

1. expand upon：详细阐述

例句：He expanded upon his ideas in a long speech.

2. expand into：扩展成为

例句：The company expanded into new markets over the past few years.

3. expand ones knowledge of：扩大某人的知识面

例句：I am trying to expand my knowledge of foreign languages.

4. expand one"s horizons：开阔视野

例句：Reading books can help us expand our horizons.

5. expand one"s capacity for：扩大某人的能力

例句：I am trying to expand my capacity for learning new things.

6. expand one"s network：扩大社交网络

例句：I am trying to expand my network by meeting new people.

7. expand one"s business/revenue/income：扩大业务/收益/收入

例句：Our company is expanding our business into new markets.

英文小作文：

标题： Expanding Our Horizons

Our world is constantly expanding, and with it, our horizons should also be expanded to keep up. Learning new languages, meeting new people, and exploring new cultures can all help us to expand our horizons and make us a more well-rounded person.

However, it"s not just about learning about others, it"s also about learning about ourselves. Expanding our horizons can help us to understand ourselves better and discover new aspects of our personality that we may have overlooked before.

In conclusion, expanding our horizons is not just about expanding our knowledge or our network, it"s about expanding our understanding of the world and ourselves. It"s about constantly challenging ourselves and seeking out new experiences that will make us a better person.