"ethnic groups" 的音標為 [?eθn?k ?gru?dz] ，基本翻譯為“種族群體”，速記技巧為：可以將其拆分為“ethnic”（種族）和“groups”（群體）兩個部分記憶。

以下是十個與ethnic groups相關的英文詞源及其變化形式和相關單詞的說明，字數約為100字：

1. Ethnic：詞源為希臘語ethnos，意為民族或種族。變化形式包括復數形式ethnies，表示多種族或多種族群體。相關單詞包括ethnicity（種族特征），ethnic group（種族群體）等。

2. Ethnicity：詞源為ethnic的名詞形式，意為種族特征或種族身份。變化形式包括復數形式ethnicities，表示多種族特征或多種族身份。相關單詞包括ethnic discrimination（種族歧視），ethnic conflict（種族沖突）等。

3. Minority：詞源為拉丁語minor，意為較小的或次要的。變化形式包括復數形式minority，表示少數群體或少數派別。相關單詞包括minority group（少數群體），minority rights（少數群體權利）等。

4. Mixed：詞源為拉丁語miscere，意為混合或調和。變化形式包括復數形式mixed，單數形式mixed-race等，表示混血種族或混血人種。相關單詞包括mixed-ethnicity（混血種族特征），mixed-race group（混血種族群體）等。

5. Ethnocentrism：詞源為希臘語ethnos和centerism，意為以自己種族為中心的觀念或態度。變化形式包括復數形式ethnocentrisms等，表示種族中心主義或民族優越感。相關單詞包括multiculturalism（多元文化主義），multiracialism（多元種族主義）等。

6. Ethnic group：表示種族群體或民族群體，是ethnic groups的常用表達方式。

7. Ethnic minority：表示在某個地區或某個社會中的少數種族或民族群體。

8. Mixed-race：表示具有兩種或多種不同種族血統的人種或人。

9. Ethnic discrimination：表示對某一特定種族或民族的歧視行為或態度。

10. Ethnic conflict：表示不同種族或民族之間的沖突或爭端。

常用短語：

1. ethnic group

2. minority ethnic group

3. majority ethnic group

4. diverse ethnic groups

5. diverse cultures

6. multicultural society

7. ethnic diversity

例句：

1. The city is home to many ethnic groups, each with their own unique customs and traditions.

2. The country has a rich tapestry of minority ethnic groups, each with their own unique language and culture.

3. The majority ethnic group in the region is the Han, but there are also many minority groups, such as the Tibetan and Mongolian.

4. The diverse ethnic groups in this country have created a unique cultural melting pot.

5. In this multicultural society, we should respect and appreciate the differences of each ethnic group.

6. The ethnic diversity of this country is a source of strength and creativity.

英文小作文：

In this diverse society, we are all unique individuals with our own culture and traditions. Each ethnic group has its own unique way of life, language, and customs that make up our rich tapestry of cultures. We should respect and appreciate each other"s differences and embrace the richness that diversity brings to our society. Through understanding and acceptance, we can create a more inclusive and harmonious world where everyone feels welcomed and respected.