直系的

They were the direct descendants of the Dutch settlers.

他们是荷兰移民后裔。

Shakespeare's last direct descendant.

莎士比亚最后后裔。

The 23 million-year-old creature was not a direct ancestor of today's seals, sea lions and walruses, a group known collectively as pinnipeds.

这只2300万年生物并不是如今豹、狮和象祖先，而是来另一个分支。