The idea that the human personality is a blank SLATE, to be written upon only by experience, prevailed for most of the second half of the 20th century.
20世纪下半叶，人们普遍认为性格是个白板只是由人生经历来书写。
2
It involved a series of black letters presented in the centre of a white screen. Each letter was shown for half a second and followed by a blank screen for two seconds before the next letter appeared.