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可可英語每日一句口語：
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.
生活就像一架鋼琴：白鍵是快樂，黑鍵是悲傷。但是，要記住只有黑白鍵的合奏才能彈出美妙的音樂。
【知識點講解】
both adj.二者，兩者都
例句：
He had to have both legs amputated.他不得不鋸掉雙腿。
