异性恋爱

Stereotypes of heterosexuality and homosexuality and the rigid boundaries between them can be explored by asking questions like

第一，恋爱中的同性恋者和异性恋者是否有同样爱的感觉？

The team recruited 44 heterosexual men and gave half of them a nasal spray spiked with oxytocin.

研究小组招募了44名异性恋爱的男人，给其中的一半人使用添加了催产素的鼻腔喷剂。

Becaus there is no love experience, the skill with the opposit sex ar lacked.

因为没有恋爱经验，故而缺乏跟异性交往的技巧。

Senior students have a poor knowledge on sex. They master menstruation, prostitution, being fertilized, childbearing, abnormality well while they know little about sex hormones,sexual intercourse and pregnancy,spermatorrhea,ovaries, testis in the middle. 2. senior students have developed a quick consciousness of sex. About 17.7% boys and 17.2% girls desire to date with the opposite sex. 54.1% boys and 42.2% girls are willing to date with the opposite sex. What's more, the willingness and percentage of dating with the opposite sex increase with the grade. Senior students do not have a steady and stable affection.

研究结果表明：1、高中生性知识相对贫乏，高中生掌握得较好的概念依次是月经、卖淫、受精、分娩、性变态；掌握较差的概念依次是性激素、性爱抚；对妊娠、遗精、卵巢、睾丸等概念的掌握的程度大致相当。2、高中生性心理表现为：性意识发展迅猛，主要表现在对异性的极大关注和向往，约有17.7%、17.2%的男、女高中生渴望与异性交往；约54.1%、42.2%的男、女高中生愿意与异性交往，并且这种异性交往的愿望随年级升高有上升趋势，并且随着年级的增加，同一年级中男、女生渴望交往愿望的性别差异也在增加；性情感稳定性不高，约37.7%和32.7%的男女高中生谈过恋爱，目前仍有9.8%和10.9%的男女高中生正在恋爱。

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％。