人类有多少种生理性别？你的性别是由什么决定的？How many biological sexes are there in humans? What determines your gender? from 性别 Watch Video
Preview(s): Play Video: (Note: The default playback of the video is HD VERSION. If your browser is buffering the video slowly, please play the REGULAR MP4 VERSION or Open The Video below for better experience. Thank you!)
Your browser does not support playing the video.Please download the video!
⏲ Duration: 6 minutes 23 seconds 👁 View: 75.2K times
Play Audio:
Your browser does not support the audio tag.Please download the audio.