The property is the birthright of the eldest child.

长子享有财产的继承权。

《牛津高阶英汉双解词典》

His eldest child is still in the sixth form.

他年龄最大的孩子才上六年级.

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I am from a well - to - do family and the eldest child of three.

生长在富裕的家庭,我是家中的长子.

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Her eldest child helps her to look after the younger children.

她最大的那个孩子帮助她照顾年纪小的孩子们.

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Her eldest child is at university.

他的大孩子上大学了.

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As Mary was eldest child, she had to look after her younger brothers and sisters.

因为玛丽最老, 所以她不得不照顾弟弟妹妹.

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