Fertilization of two or more ova released during the same menstrual cycle by sperm from separate acts of coitus .
同一次排卵后连续有两个或更多的卵子受精，尤指被不同的雄种畜。
" England boasts some of the finest lovemaking in the world , with a tradition of coitus going back generations , " lovers are told .
生产商还向情侣们鼓吹：“英国人号称做爱情致冠全球，性爱传统代代传。”
Furthermore , " hiv is less easily transmitted and gonorrhea is more easily transmitted during unprotected coitus ; thus the condom is more forgiving of imperfect use when it comes to hiv protection . "
