性交

In Chapter 3, we discuss the other orthogonalities in in Banach space, and give some properties of them. The emphase of the chapter is to study the relations of Birkhoff orthogonality, Isosceles orthogonality and Pythagorean orthogonality, and it is proved that if one of these induces another, then the space is an inner product space.

第三章研究其它几种正交性问题，讨论Birkhoff正交性、Isosceles正交性与Pythagorean正交性之间的关系，证明了：如果这三种正交性的任一种都蕴含另一种，那么此空间就是内积空间。

The conversion boundary of self-incompatibility was researched by sowing by stage. Sunshine of day and temperature was studied critically by investigating leafage and researching traits indoors. The results showed that the daily minimum temperature was the principal factor of affinity conversion and the affinity conversion boundary was 16.5~18.1℃.HE97 was primarily regard as self-incompatible line in this research. The method was by inbreeding and sib HE97, Half the silk of HE97 and Zheng58. Inbreeding and cross have been done simultaneously. The extending condition of pollen tube was observed by dying the silk after pollinating 4 hours. The individuals with pollen tube were observed having seeds, while the individuals without pollen tube were observed having few seeds or no seeds. So this study regard HE97 as sporophytic self-incompatibility .The planting ration of female parent HE97 and male parent 87-1 was 4:1.The nature cross-pollination was studied by the theory of endosperm xenity, the study show that the setting percentage of HE97 was 625%, in which the seed in self was 70% and the seed in hybrid was 30%. This was consistent with the study of silk anatomy structure, then come to the same conclusion: compatible pollen germination and fertilization can stimulate the self-incompatible pollen germination and fertilization in the same corn cob.

通过分期播种，进行了光温敏自交不亲和材料HE97亲和性转换区间的研究，依据田间跟踪调查叶龄及室内考种研究了HE97亲和性转换区间的光温临界值，结果表明：1日最低温度是影响HE97自交不亲和性的主要原因，亲和性转换区间在16.5℃～18.1℃之间。2通过HE97自交和姊妹交以及将HE97与郑58作为双亲，各自的花丝一分为二，分别正反交，授粉后4个小时分别取其花丝进行固定、染色，观察花粉管的伸长情况，根据结实率与花粉管伸长的对应关系，结果发现观察到花粉管的对应植株收获到了种子，而没有观察到花粉管的对应植株结实率极低或没有结实，本研究把HE97初步划为孢子体自交不亲和类型。3以HE97为母本，87-1为父本，按4母：1父行比，通过花粉直感效应研究天然异交率，结果母本HE97结实良好(62%)，其中自交粒占70%，异交粒占30%，结合花丝切片观察表明，亲和花粉的萌发及受精会导致落在同一果穗柱头上不亲和花粉的萌发不再受抑制。

Compared with progenies of inter-tree-pollinated E.urophyllaagain,progenies of self-pollinated E.urophylla showsignificant inbreeding depression in height,DBH and volume;theyshow no significant inbreeding depression in water content ofgreen wood,basic density and bark thickness;their content of1%NaOH extractives increases significantly,and their maturefiber length decreases significantly.

与尾叶桉株间杂交子代比较，尾叶桉自交子代的树高、胸径和材积具有显著至极显著的近交退化，生材含水率、木材基本密度和树皮厚度无近交退化现象，1％NaOH抽提物含量呈略显著性提高，成熟材纤维长度呈显著性减短；尾叶桉自由授粉子代的近交退化规律大致与自交子代相同，但其退化程度远不及自交子代。

Coitus interruptus (lat. interrupted coitus) Withdrawal of penis from the vagina before ejaculation.

性交中断在射精之前从阴道里抽出阴茎中国大陆之前译成&体外排精避孕法&。

Artificial insemination is a means of helping couples to have children if they are unable to conceive through sexual intercourse.

人工授精是一种手段，帮助夫妇有子女，如果他们无法设想通过性交。

It may also be transmitted by vaginal or anal intercourse, although this too seems to be a very rare occurrence.

也有可能传染阴道或肛门性交，虽然这也似乎是一个非常罕见的发生。

In both sexes the warts may also appear around the anus as a result of infectious anal intercourse.

在两性，如果有感染性的肛门性交，湿疣也可以环绕在肛门周围。

The latter is also true for sensations inside the rectum during anal intercourse.

在肛门性交中，在直肠里的性感觉也有赖于心理因素。

Humanity has always had a strange avidity for unusual sexual postures, and if a man likes to use his wife, as Benvenuto Cellini says, 'in the Italian way', well that is a matter of taste.

人类一向就是婪无厌地探究着性交的特殊姿式的，假如一位丈无喜欢和他的女人&意大利式&地一如赛凌尼的说法一尽情尽意，又有什么不可呢，那不过是嗜好的问题罢了。

Humanity has always had a strange avidity for unusual sexual postures, and if a man likes to use his wife, as Benvenuto Cellini says, 'in the Italian way', well that is a matter of taste. But I had hardly expected our game-keeper to be up to so many tricks. No doubt Bertha Coutts herself first put him up to them.

人类一向就是婪无厌地探究着性交的特殊姿式的，假如一位丈无喜欢和他的女人&意大利式&地一如赛凌尼的说法一尽情尽意，又有什么不可呢，那不过是嗜好的问题罢了。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。