eldest child

eldest child的音标是[ˌeldi ˈtʃaɪd tθɪd]，基本翻译为长子或长女。速记技巧可以考虑用谐音的方式，如“埃乐弟吃糖”，这样记忆会比较有趣且不容易忘记。

eldest child（长子/长女）的英文词源为古英语中的eldest和child的合成词。其变化形式包括其复数形式children，其过去分词和过去式形式分别为eldst、eldst、elddest和elddest。相关单词包括eldest son（长子）、oldest child（长子/长女）、youngest child（幼子/幼女）、youngster（年轻人）、childhood（童年）、childish（幼稚的）、pre-school（学前）、school-age（学龄）以及childless（无子女的）。这些单词都与孩子和童年有关，体现了人类对下一代的高度关注和爱护。

常用短语：

1. eldest son

2. eldest child of the family

3. eldest sibling

4. oldest child

5. eldest offspring

6. firstborn

7. top dog

例句：

1. John is the eldest child of a middle-class family.

2. She is the eldest of three siblings.

3. The eldest son of the king is always respected by his subjects.

4. She is the oldest child in her family and takes care of her siblings when they are sick.

5. The eldest sibling in our family always helps with the household chores.

6. I am the firstborn child of my parents and I always feel responsible for my younger siblings.

7. He is the top dog in his class and always gets good grades.

英文小作文：

题目：My Family"s Eldest Child

I am the eldest child in my family, and I always feel a sense of responsibility towards my younger siblings. I remember when I was young, I used to help my parents take care of them and make sure they had everything they needed. Now that I am older, I still try to be a good role model for them and help them with their studies and hobbies. I am proud to be the eldest child in my family because I know that I have a responsibility to set a good example and to help my family succeed in life.