明月几时有，How often is there a moon so bright?
把酒问青天。 I lift my cup towards the heaven blue.
不知天上宫阙，Know not one day in the celestial palace,
今夕是何年？ Is what year of tonight? 1
我欲乘风归去，I want to ride on the wind for my return,
又恐琼楼玉宇， And yet I am afraid in those tall jade towers.
高处不胜寒。 I can bear no more of the cold.
起舞弄清影， In dance, moonlight and I,
何似在人间！ Far better than life in Heaven!
转朱阁， Turning cinnabar red pavilions,
低绮户， Lowering the exqusite carved windows,
照无眠。 Moonlight shafting through to see no sleepy head.
不应有恨， Ought not regrets that there be,
何事长向别时圆？ That why the moon is always full during partings?
人有悲欢离合， There will always be joy and there will always be sorrow,
月有阴晴圆缺， Just as the moon waxes and wanes.
此事古难全。 These sort of things cannot be helped.
但愿人长久， Long we hope to be on this earth,
千里共婵娟 。 Even though a thousand miles apart, still we can enjoy this same moonlight.
1. Chinese believe that a day in heaven may be equivalent to 3 years on earth. However different sources state different time equivalents.
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老婆婆艰难地弯下腰，捡起掉落的东西。Old granny bent down to pick things that were strewn on the floor.
喘着气，坐下椅子向后靠着 Heaving away, she finally had to sit down on a chair with some backing.
For your reference.
I have run into two different translations of this famous Ci.
The first one was translated by Lin Yutang. He wrote a book for Su Tungpo entitled The Gay Genius: The Life and Times of Su Tungpo. It was written in English, and later translated by someone else into Chinese. It's Chinese version is very popular.
How rare the moon, so round and clear!
With cup in hand, I ask of the blue sky,
"I do not know in the celestial sphere
What name this festive night goes by?"
I want to fly home, riding the air,
But fear the ethereal cold up there,
The jade and crystal mansions are so high!
Dancing to my shadow,
I feel no longer the mortal tie.
She rounds the vermilion tower,
Stoops to silk-pad doors,
Shines on those who sleepless lie.
Why does she, bearing us no grudge,
Shine upon our parting, reunion deny?
But rare is perfect happiness—
The moon does wax, the moon does wane,
And so men meet and say goodbye.
I only pray our life be long,
And our souls together heavenward fly!
Another translation is by Xu Yuanchong (許淵冲), who has been hailed as "詩譯英法唯一人".
How long will the full moon appear?
Wine cup in hand, I ask the sky.
I do not know what time of the year
’Twould be tonight in the palace on high.
Riding the wind, there I would fly,
Yet I’m afraid the crystalline palace would be
Too high and cold for me.
I rise and dance, with my shadow I play.
On high as on earth, would it be as gay?
The moon goes round the mansions red
Through gauze-draped window soft to shed
Her light upon the sleepless bed.
Why then when people part, is the oft full and bright?
Men have sorrow and joy; they part or meet again;
The moon is bright or dim and she may wax or wane.
There has been nothing perfect since the olden days.
So let us wish that man
Will live long as he can!
Though miles apart, we’ll share the beauty she displays.
