鸟无翅膀不飞。同样,飞机要是没有发动机的话,就不会飞上天空,在蓝天上自由翱翔。可见发动机是多么重要啊！我们这期介绍的科学家爷爷,就是研究发动机的蔡睿贤爷爷。蔡爷爷是中国科学院工程院的院士,对我们国家可是做出了大贡献的！那么蔡爷爷的小时候是什么样子呢?好吧,就让我们一起去蔡爷爷的童年看一看吧！ Birds without wings do not fly. Similarly, if the aircraft without the engine, it will not fly to the sky, flying freely in the blue sky. Visible engine is how important ah! The grandfather of the scientist we introduced in this issue is Grandpa Cai Ruixian who studies the engine. Grandpa Choi is an academician of the Chinese Academy of Engineering, but made a great contribution to our country! So what is the look of Grandpa Tsai’s childhood? Well, let’s take a look at Grandpa Tsai’s childhood!