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知乎，中文互联网高质量的问答社区和创作者聚集的原创内容平台，于 2011 年 1 月正式上线，以「让人们更好的分享知识、经验和见解，找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容，聚集了中文互联网科技、商业、影视、时. 这种表示方法应该在国外比较普遍，用来表示该螺纹是外螺纹还是内螺纹。 F：Female，在螺纹或接头的图纸或样本中，表示 母螺纹 或内螺纹； M：Male，则表示 公螺纹 或外螺纹。 P 代表 螺距，英文为Pitch。指的是螺纹上相邻两牙对应点之间的轴向距离 别人给了个115网盘的链接，但是是115://开头的，这种类型的链接是怎么下载的，这个链接没有办法直接像磁… female的拼写是为了体现和male相对而改成这样的。 boy和girl，两个都是单音节字，本意都不一样，所以看起来当然没有关联了。 原文发表在 jimr原文链接：a study on male masturbation duration assisted by masturbators | journal … 参考资料： 维基百科英文词条：Orgasm 维基百科英文词条：Human sexual response cycle 外文文章：Female orgasm captured in series of brain scans Vance E B, Wagner N N. Written descriptions of orgasm: a study of sex differences. [J]. Archives of Sexual Behavior, 1976, 5 (1):87-98.
Sex = male and female gender = masculine and feminine so in essence Sex refers to biological differences Chromosomes, hormonal profiles, internal and external sex organs Gender describes the characteristics that a society or culture delineates as masculine or feminine. 欢迎大家持续关注InVisor学术科研！喜欢记得 点赞收藏转发！双击屏幕解锁快捷功能~ 如果大家对于 「SCI/SSCI期刊论文发表」「SCOPUS 、 CPCI/EI会议论文发表」「名校科研助理申请」 等科研背景提升项目有任何想法的话，十分欢迎大家来戳一戳芳老师（一般人芳老师是不会告诉ta客服微信滴： invisor003.
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