Crime against nature、Buggery 和Pederasty均是法律语言中指违反自然的性行为的术语。

Crime against nature, 指所有刑法中规定禁止的有悖自然的性行为，包括肛交、口交、兽奸等； 在普通法中，该术语包括： Bestiality和 sodomy 两种含义。

其中， bestiality，Sexual contact between a human being and an animal。 主要指两性中任何一方与动物发生性交；sodomy， a sexual act in which a man puts his penis in sb's, especially another man's, anus 。多指男人之间或两性之间的肛交，此时它可与 buggery 替换使用。

Buggery 多指从肛门进行性交，即鸡奸，也可指用肛门或阴道与动物发生性交。

Pederasty， a sexual act in which a man puts his penis in sb's, especially another man's, anus。 则指一成年男人与一男童进行肛交，此种行为在美国各州均被视为非法。

参考双语例句：

The Bill proposes to abolish the common law presumption that a boy under the age of 14 is incapable of sexual intercourse, buggery or bestiality (the Presumption) to implement the recommendation of the Law Reform Commission (LRC) made in December 2010 in the Report on "The Common Law Presumption that a Boy under 14 is Incapable of Sexual Intercourse"1 (the LRC Report).

条例草案建议废除未满14岁的男童无能力性交、 肛交或兽交此项普通法推定(下称"该项推定")，以落实法律改革委员会 (下称"法改会")于 2010年 12日在《14岁以下男童无性交能力的普通法推定》报告书1 (下称"法改会报告书")所提出的建议。

Sexual violence, including pederasty in its local form, which is widely sensationalized in media reports, is a crime that incurs serious punishments under the Afghan legal system.

被媒体报道大肆渲染的性暴力，包括在当地表现为鸡奸的行为，是一种根据阿富汗法律系统应受严惩的罪行。

Matrix Support Group (MSG) reported that the legal system has made massive efforts to eradicate instances of discrimination and unequal treatment in almost all areas except in issues of homosexuality.23 Although no provision in the Constitution explicitly provides for or prohibits homosexuality,24 MSG noted that male homosexuality is illegal in Lesotho by virtue of the sodomy law, while the law is totally silent on female homosexuality.25 MSG added that lesbians are also subjected to the patterns of discrimination suffered by gay men.26 14.

矩阵支持团体报告说，为了在几乎所有领域消除歧视和不平等待遇情况，在法律制度方面已作出巨大努力，但对同性恋问题仍重视不足。23矩阵支持团体注意到，虽然《宪法》没有明确规定或禁止同性恋，24但是根据莱索托《鸡奸法》，男性同性恋行为为非法行为，而在女性同性恋问题上，法律却避而不谈。

In February 2010, Fiji passed a law decriminalizing consensual same-sex conduct, through the National Crimes Decree.21 Hong Kong Special Administrative Region of China also overturned a long-standing statute banning sodomy in 2005, and since 2007, consensual same-sex acts have also been legal in Nepal.22 15.

在具有里程碑意义的1998年争取男女同性恋者平等全国同盟及另一方诉司法部长及其他人的案例中，南非宪法法院废除了三项单独的鸡奸法，在裁定《南非宪法》禁止基于性取向的歧视时指出所有人有权享有尊严和平等。