I knew that my God was a real God and [theirs] was an idol.

我知道我的神灵是真正的神灵，而[他们的]不过是泥雕木偶。

youdao

There were nearly three dozen girls I knew through theirs introducing.

NPR: An Outstanding Name for an Outstanding Student

When I saw a wire service photo several hours later of Time's cover, a standard news shot of Diana, I knew our issue would crush theirs on the newsstand.

CNN: The race for the perfect cover: 'Heaven while it lasted'