复数： rubbings

Mutual masturbation or body rubbing has a variety of advantages .

互相自慰和身体的相互摩擦有很多好处。

It can be excruciating when we 're rubbing two rocks together and getting nothing .

当我们摩擦两块石头却一无所获时，会感到十分痛苦。

Certain fabrics develop a static charge while rubbing , which might cause them to cling .

某些衣料摩擦时会产生静电，从而使它们贴在一起。

Researchers collected the male scents by rubbing glass beads on the bottom of each participant 's foot , and swabbed the same skin for microbes .

研究人员通过玻璃珠摩擦实验人员的脚底收集了每个人的气味，并在米个人的体表涂上同样的微生物。

Chlamydia and gonorrhea are rare in lesbians but if they are present may be passed on through sharing sex toys or rubbing vulvas together .

衣原体和淋病在女同性恋者中比较稀少，但是有的话，它们会通过共享性道具和摩擦外阴传染。