Nothing could be more wonderful.

= Nothing could be nicer.

= Nothing would please me more.

没有比这更让人

高兴的了。

I'm on Cloud Nine.

我活得非常幸福。

I'm in seventh heaven.

我沉浸于极大的快乐之中。

Cloud Nine”极乐心境，狂喜状态”

seventh heaven“极乐世界，最高幸福”

I'm happy as a clam.

我很快乐。

A: How's your life after marriage?

你婚后生活怎么样？

B：I'm happy as a clam.

我很快乐。

happy as a clam“非常快乐，非常幸福”

I'm so happy.

= I'm really delighted.

我太高兴了。

I'm as happy as I can be.

我高兴极了。

A: I've heard you got promotion.

我听说你升职了。

B: Yes, I'm as happy as I can be.

是的，我高兴极了。

I've never been this happy as I am now.

= This is the happiest moment in my life.

= This is the best moment of my life.

我从没有这么高兴过。

I'm walking on air.

我感到飘飘欲仙。

A：How do you feel?

你现在感觉如何？

B：I'm walking on air.

我感到飘飘欲仙。

walk on air洋洋得意”

I'm high on life.

我活得很快乐。

A: You look happy every day.

你每天看上去都很快乐。

B：Yes．I'm high on life.

是的，我活得很快乐。

high在这里是“高兴的，快活的”意思。

I'm in a great mood today.

我今天心情很好。

A: I'm in a great mood today.

我今天心情很好。

B：Tell me why.

告诉我为什么。

I lucked out today.

= I'm in luck today.

= I feel lucky today.

= It's my lucky day.

今天的运气真好。

luck out“运气很好，侥幸成功”

You're to do exactly as you please.

= Please do exactly as you please.

你高兴怎么样就怎么样。

You made me happy.

你使我感觉到了幸福。

A: Happy birthday! Here is a small gift.

生日快乐！这是个小礼物。

B: Thank you! You made me happy.

谢谢！你使我感觉到了幸福。

This is too good to be true.

简直不敢相信有这样的好事。

It's unbelievable.

真难以置信。

I'm on top of the world.

= I'm sitting on top of the world.

我太高兴了。

A: You won the first prize.

你得了一等奖。

B：I'm on top of the world.

我太高兴了。

on top of the world“幸福到极点，心满意足”

I'm in high spirits.

= I'm over the moon.

我非常高兴