family and genera的用法和样例：
例句
- The few-species families and few-species genera had a larger quantity than the big ones.
井冈山藤本植物科属组成中，寡种科和寡种属较多，大种科和大种属较少。 - The total number of family and genera increased gradually as succession proceeded, and Gramineae were dominant species at all time.
在科属总数上，科属数随演替逐渐增加，其中，禾本科植物始终处于优势种地位。
