- 1
A bloodline is all the members of a family of people or animals over a period of time — parents, children, grandchildren, and so on. Breeders of horses, dogs, and cattle use it a lot when they care who an animal’s parents were. For people it can sound formal or old-fashioned (“a royal bloodline”); everyday talk often just says family. It is about descent, not about the red liquid in your veins, and it is not blood type (A, B, AB, O). Some speakers stretch it to mean the “true line” of a tradition or a school of art.
血統、血脈（指家系，不是血型）
組成From blood + line. Blood here means family; line means the path down the generations.
原始詞典資料4 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
bloodlinenoun/ˈblʌdˌlaɪn/
- 1
The abstract link between a person and their ancestors.
- For centuries in Britain, the country’s noblemen have sat in parliament by virtue of their bloodline – but not for much longer.
- 2
The pedigree of an animal.
- 3
By extension, the predecessors of a particular item or product.
- No other Sport Utility Vehicle has a bloodline like the Cayenne.
- 4
A line of dark red muscle running down the middle of a fish.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。