grographical variation的用法和樣例：
例句
- Discontinuous geographic variation is often set aside as a special case.
不連續地理變異，人們往往作為一種特殊情況把它分開。 - Small amounts of geographic variation have been demonstrated in several other traits, such as cortical concentration of certain monoterpene.
在其他幾個性狀上，亦經證明有少量地理變異，諸如皮部的某些單萜烯濃度。
