3.the author spent 25 years researching the Tsar's life.
作者花了25年的时间研究这位沙的一生。
4.The tsar protected his personal prerogatives.
沙维护了自己的私人特权。
5.He assumed full authority as tsar in 1689.
1689年他全面掌权做了沙。
6.He was executed in 1887for plotting to assassinate the tsar.
他因密谋暗杀沙在1887年被判处极刑。
7.Petya felt that he looked unpresentable, and was afraid that if he showed himself in this guise to the gentlemen-in-waiting, they would not admit him to the Tsar's presence.