越障:6'33 The whole passage is talking about a Nobel Price winner. His past experience and his study 1. Why and when he moved to America 2. Why he chosed "memory" field 3. How he react to his homeland's recognization when he won Nobel Price 4. Whether "overselling" blocks his field 5. How he performed the experiment---begin with snails 6. Whether it is a good idea to remove badmemories?--Not at all. All experiment, whether good or bad, shapes you.