Through the research on petroleum and nature gas, design a multi-source heatpump of single and double effect lithium bromide, the two stage heatpump unit, process of nature gas liquefaction etc.
Photosynthesis: A Two--Stage Process Photosynthesis occurs in two stages: the light--dependent reactions and the light--independent reactions (also known as the Calvin Cycle).
To sum up briefly, today we've discussed the definition of learning, the two stages involved in the process of learning and the four types of learning.