Jill is the eldest of three , ie the oldest child in a family with three children.

吉尔是一家叁个孩子中最大的.

辞典例句

She was the oldest child.

她是最大的小孩.

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Are you the oldest child in your family?

你是家中最大的孩子 吗 ?

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Mr Xue , the oldest child, wore secondhand clothes and skipped meals throughout high school.

薛先生是家中的长子.上高中时穿着旧衣服,常常不吃饭.

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