She only has eyes for you.

她眼里只有你。

Lately, bird watchers only have eyes for owls.

最近，鸟类观察者只看到了猫头鹰。

She might tell him that he is the only person she wants, or " I only have eyes for you."

她可能会告诉这个人“我的眼里只有你”(I only have eyes for you)。

She only has eye for you.

她眼里就只有你。

I only have eyes for my wife, but I'm told there are other expressions to describe beautiful women.

我的眼里只有我的妻子，但我听说还有其他的表达方式来形容美丽的女人。

Back from his journey, the youth thrust the devil's hairs at the king— but his greedy father-in-law only had eyes for the gold.

旅途归来，年轻人将魔鬼的头发伸向国王——但他贪婪的岳父眼中只有金子。