A piano has black keys and white keys.
钢琴有黑白两种琴键。
黑键是悲伤。
In the center of the piano are two black keys.
在钢琴的中心中是二支黑色的钥匙。
It can be played on the black keys of the piano.
可以在钢琴的黑键上演奏。
The white keys represent happiness, while the black keys represent sadness.
白键代表快乐，黑键代表悲伤。
Israel taught himself to play the piano. But he could play only the black keys.
巴林弹钢琴无师自通﹐但是只会弹黑键。
Piano keys are either black or white.
钢琴键不是黑色的就是白色的。
She has beautiful black and white keys, she is a musician.
她有着亮丽黑白键，她是一位音乐家。
A piano has black and white keys.
钢琴上有黑白键。
The white keys represent happiness and the black shows sadness.
白色琴键代表幸福，黑色琴键代表悲伤。
The white keys represent happiness and the black shows sadness.
白色琴键代表欢乐，黑色琴键代表忧伤。
Life is like a piano. The white keys represent happiness and the black shows sadness.
生活就像一架钢琴，白键代表幸福，黑键表示悲伤。
Life is like a piano. The white keys represent happiness and the black shows sadness.
生活就像一架钢琴，白键代表幸福，黑键表示悲伤。
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