biological variability

• 生物差异

biological variability的用法和样例：

例句

1. They have speculated about why human populations have different physical appearances and about whether the biological differences between groups are more than skin deep.
   对于人群间体表差异的起源，早就有许多猜测，至于人群间的生物差异究竟只限于肤浅处，还是深刻得多，更是议论纷纷。