直系的

例句：

1. 1. The direct descendants of the ancientGreeks are still alive today.
   古代希腊人的直系后裔仍然活在今天。
2. 2. Thelineage of the family is tracedback to a long-lost princess.
   这个家族的血统可以追溯到一个早已失踪的公主。
3. 3. The descendants of thelost tribe were scattered across the continent.
   那个失落部落的后代被分散在大陆的各个角落。