secondary sex ratio

• 第二性比率； 继发性比； 出生性比； 次级性比

secondary sex ratio的用法和样例：

例句

1. The authors inferred that it is more reasonable to make lithology ratio graphics with the limiting probability in the fixed vector than with the lithology ratio only.
   设想运用固定向量中的极限概率代替以往的岩性比率作岩比图更加合理有意义。