third sex

During the third month of pregnancy the sex of the child becomes determinable.

孩子的性别在妊娠期第三个月便可查明。

More than a third of married couples in Japan have stopped having sex, many of them because they are too tired or just can't be bothered, a government-backed medical researcher said on Wednesday.

日本一名政府医学研究人员于本周三称，目前日本有超过三分之一的夫妇不过性生活，其中很多人是因为太累或者只是嫌麻烦。

And the third group are men who have unprotected sex with other men.

还有第三类是那些和别的男性没有性保护的男士.

And the third group are men who unprotected sex with other men.

第三个是没有采取保护措施的同性性行为者.

The third part, the use of longitudinal history study to research the dance art dinkum sex of the nature and cause of formation, main function, analyzes in the dance art dinkum sex from perceptual into the essence of the theory research.

第三部分，运用纵向史学研究来考证舞蹈艺术纯粹性的成因、本质及其主要功能，分析出舞蹈艺术纯粹性从感性转变为理论的实质研究。