科学态度的本质是什么，研究和应用物理、生物、化学、地质、工程、医学或其他科学的人的态度是什么？
What is the nature of the scientific attitude, the attitude of the man or woman who studies and applies physics, biology, chemistry, geology, engineering, medicine or any other science?
药品包装的本质是一门活跃的化学学科。
The nature of pharmaceutical packaging is one of active chemistry.
记得吗，多巴胺的本质是寻找化学刺激，它吊起我们的胃口。
Remember thatdopamine is a chemical seeking, it whets our appetite.
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