A FEW years ago Yadong Yin was experimenting with tiny beads that changed colour when a magnetic field was applied to them.
几年前殷亚东做了这样一个实验：当对微珠施加一个磁场压力时，珠子的颜色起了变化。
A FEW years ago Yadong Yin was experimenting with tiny beads that changed colour when a magnetic field was applied to them.
几年前殷亚东做了这样一个实验：当对微珠施加一个磁场压力时，珠子的颜色起了变化。
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