达利博尔·韦塞尔于1934年出生在捷克斯洛伐克的布拉格。
布拉格查尔斯大学的捷克科学家小组执行了此项研究，他们招募了86对夫妇参与调查。
The study carried out by a team of Czech scientists based at Charles University in Prague, recruited 86 couples for the research.
1987年，戈尔巴乔夫先生曾造访布拉格，那时捷克人民要求他留下来。
When Mr Gorbachev visited Prague in 1987, the Czech people asked him to stay.
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