She was my firstborn.

她是我的长女。

《柯林斯英汉双解大词典》

Then say to Pharaoh, 'This is what the Lord says: Israel is my firstborn son

你要对法老说：‘耶和华这样说：以色列是我的儿子，我的长子。

youdao

Reuben, you are my firstborn, my might, the first sign of my strength, excelling in honor, excelling in power.

流便哪，你是我的长子，是我力量强壮的时候生的，本当大有尊荣，权力超众。

youdao

Also I will make him my firstborn, higher than the Kings of the earth.

我也要立他为长子，为世上最高的君王。

youdao

I will also appoint him my firstborn, the most exalted of the Kings of the earth.

我也要立他为长子、为世上最高的君王。

youdao

Also I will make him [my] firstborn, higher than the Kings of the earth.

我也要立他为长子，为世上最高的君王。

youdao

Also I will make him [my] firstborn, higher than the Kings of the earth.

我也要立他为长子，为世上最高的君王。

youdao