sexes/seks/名词性别What sex is your cat?你的猫是公的还是母的？性活动；（尤指）性行为，性交extramarital/premarital sex婚外／婚前性行为/seks/动词辨别…的性别How do you sex fish?你如何辨别鱼的雌雄？想跟读，去练习
