伦纳德在有人发明引擎作动力以前就设计了飞行器，他跑在了时代的前头。
Leonardo designed flying machines before anyone had invented engines to power them, he was born before his time.
德在有人发明引擎作动力以前就设计了飞行器，他跑在时代的前头。
Leonardo designed flying vehicle before anyone had invented engines to power them; he was born before his time.
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