I just employed the most ancient form of Coitus Interruptus, as the Romans called it.

Their meeting is usually about as a result of coitus.

精卵相遇通常是性交的结果.

Most often, sexual dysfunctions are defined in relation to the ability to perform or enjoy coitus.

极为常见的是, 性功能障碍被定义为关乎进行或享受性交(阴道性交译者注)的能力.

Unfortunately, many men and women diminish their enjoyment of coitus by an overconcern with orgasm.

遗憾的是, 许多男女因过度关注性高潮而降低了性交合的乐趣.

During sexual excitement, these walls secrete a watery substance which serves as a lubricant coitus.

在性兴奋期, 阴道壁分泌水样液体,以备性交时润滑的需要.

Reaching orgasm shortly after the beginning of coitus is a common female dysfunction.

性交开始不久后就达到性高潮是女性常见的性功能障碍.

This is not only ineffective, but may also interfere with coitus and cause discomfort.

这种做法不仅无效, 而且也可能干扰性交和导致不适.

They may attempt coitus with calves, ponies, sheep, pigs, dogs, and even ducks or chickens.

他们可能尝试与小母牛 、 小马驹 、 绵羊 、 猪 、 狗 、 甚至与鸭或鸡交媾.

They must, therefore, be inserted 10 to 15 minutes before each coitus.

所以, 每次性交前10-15分钟就必须放入阴道内.

Attention should be paid to the gistory of unclean coitus or uterine cavity operation.

因此,在诊断感染性疾病时应注意近期不洁同房史或宫腔手术史.

The physiological significance of change of sex steroid levels after coitus will obviously require further investigation.

性交后性腺激素变化的意义有待进一步研究.

This, in turn, has increased their enjoyment of coitus.

继而, 这又增添了他们性交合的乐趣.

Pregnancy can also be avoided from coitus while engaging in all other forms of sexual intercourse.

当投入所有其他形式的性行为时,避免性交也能够避孕.

Still, some couples may hesitate to engage in coitus because of aesthetic objections to the bleeding.

尽管如此, 一些夫妇因为对经血的审美异议而不愿(在月经期)参与性交.

The intimate contact of the female sex organs during coitus can give both partners great pleasure.

在性交合过程中,男女性器官的密切接触能够给双方带来愉悦.

Some technical transform measures of the delayed coker of Nanjing Refinery are introduced.

介绍了金陵石化公司南京炼油厂焦化装置的几项技术改造措施.

The paper presents a new refining technology as etherification material with coker gasoline of Nanjing Refinery.

本文研究了南京炼油厂延迟焦化汽油作为醚化原料的一种新的精制工艺.

Coking in the fumace tubes of delayed coker is an important factor affecting unitoperahon cycle.

延迟焦化装置加热炉管的结焦是影响装置开工周期的重要原因.

Tell Colonel Coker, I am investigating the entire matter.

告诉柯克上校, 我正在调查这件事情的始末.

Colour stability of coker gas oil has been improved by DMF extraction.

以二甲基亚砜为萃取溶剂,用溶剂萃取的方法提高焦化柴油的颜色安定性.

Bindless carbon materials are prepared with green petroleum cokes or treated carbon powders from coals.

分别以生石油焦和煤系原料改性炭粉为原料成功制得了无粘结剂高强度炭材料.