求翻译：This ratio is sexual ly dimorphic; the tendency of men to have a longer fourth digit compared to the second digit (lower 2D: 4D ratio) has been described in several populations. The ratio does not change at puberty and is probably determined during prenatal differentiation of the digits as bone-to-bone ratios in the te是什么意思？

待解决 悬赏分：1 - 离问题结束还有