The attitude of science is being practical and realistic.
—Qian Xuesen
科学的态度是实事求是。
——钱学森
Studying knowledge needs thinking again and again，which is a learning method helping me become a scientist.
—Albert Einstein
学习知识要善于思考、思考、再思考。我就是靠这个学习方法才成为科学家的。
——阿尔伯特·爱因斯坦
Imagination is more important than knowledge，for knowledge is limited while imagination embraces the entire world，pushes improvement and is the source of knowledge evolution.
—Albert Einstein
想象力比知识更重要，因为知识是有限的，而想象力包罗万象，推动着进步，并且是知识进化的源泉。
——阿尔伯特·爱因斯坦
Science is unpredictable.If I had known it，I would have found it before.
—Stephen Hawking
科学是不可预测的。如果我知道的话，我早就把它做出来了。
——斯蒂芬·霍金
