gender ratio的用法和樣例：
例句
- In recent years, the gender disproportion problem of newly-born population is growing more and more serious.
摘要近年來，我國出生人口性別比失衡現象日趨嚴重。 - And they find that households with sons save more in high male-to-female sex ratio regions.
他們還發現，在男女性別比失衡的地區，有兒子家庭的儲蓄率會更高些。
