例1 据说8892公里长的边界线是世界上没有军队保卫的最长的边界线。
It is said that the 8892-km-long border is the longest border in the world not defended by the army.
It is said that the 8892-km-long border is the longest border in the world without any army defending it.
The 8892-km-long border is said to be the longest border in the world not defended by the army.
解析 主语从句It is said/reported/known/believed that sb./sth.转换成简单句形式： Sb./Sth. is/are said/reported/known/believed to be （to have been）...
There are said to be some islands...
注意主谓一致，如：There are known to be some islands off the coast.
