钢琴键盘中白色的琴键，用于弹奏基本音级
钢琴有两种类型的键，白键和黑键。
Piano has two types of keys, the white keys, and the black keys.
生活就像一架钢琴：白键是快乐，黑键是悲伤。但是，要记住只有黑白键的合奏才能弹出美妙的音乐。
Life is like a piano. The white keys are happy days and the black keys are the sad ones. Just remember you need both to make music.
生活就像一架钢琴：白键是快乐，黑键是悲伤。但是，要记住只有黑白键的合奏才能弹出美妙的音乐。
Life is like a piano: white keys are happy moments and black keys are sad moments. But remember both keys are played together to give sweet music.
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