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密歇根大学的化学家拉乌尔·科佩尔曼发明了一种只有一根头发丝的千分之一粗细的光纤探针。它很细,能穿过大多数细胞保护膜的空隙而不造成任何损伤。
Raoul Koperman, a chemist at the University of Michigan, invented a one-thousandth-diameter fiber probe with only one hair strand. It is very thin, can pass through the gap of most cytoprotective membranes without causing any damage.