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Each human cell contains 23 pairs of chromosomes, only one pair of these pairs determines a person’s sex. 一套染色体。每一个人的细胞号23对染色体，只有一对决定著一个人的性。
XIAO FENG, a real-life Chinese version of Carrie Bradshaw, TV's Sex and the City heroine. 显然，在西方媒体上，中国的任何方面总有被误解和夸大其辞的可能性。
And with 70% of the world’s sex toys made in China, its horniest country status means that a good deal of their hard work won't have to go very far. 公共供水系统？
Results: Three of women patients had karyotype such as 46, XY showed donor s sex chromosome in 4 successful cases and primary abnormity disappeared. 结果:4例移植成功患者其中异性别3例性染色体表现为供者性染色体,原有异常消失;
The report, from researchers at Oxford and the University of Exeter in England, is said to be the first evidence that a child’s sex is associated with a mother’s diet. 这个由牛津大学和位于英格兰的埃克塞特大学的研究人员所提出的研究报告，被认为是第一项证明孩子的性别与母亲的饮食是息息相关的证据。
To fulfill each other ‘s sex demand, is the common pursuit of women and women.This dispatched wear penis panties can choose different size penis to use,let both of u fulfill the control demand. 满足彼此的性爱，是男女双方共同追求的，这件可完全拆分的穿戴式阳具裤可选择不同的阳具造型进行替换使用，让彼此都成为操控性欲和满足欲望的主导者。
The basic reason of the marriage formation is a demand of keeping posterity, which limited mankind"s sex freedom, so as to explicit parentage and prevent from close relative marriages. 婚姻形成的根本原因是抚育人类后代的需要，它限制了人类的性自由，客观上借以明确亲子关系和防止近亲结婚。
New research by the universities of Exeter and Oxford provides the first evidence that a child's sex is associated with the mother's diet, and higher energy intake is linked to males. 英国埃克塞特大学和牛津大学联合开展的一项最新研究首次证明，孩子的性别与母亲的饮食有关，在受孕期间摄入高能量食物的女性生男孩的可能性更大。
As the car hit the tree he was snot out. 汽车扭在村上，他被猛地摔了出来。
The bird sang high and clearly in the tree. 鸟儿在树上清脆地高歌。
The annular markings on a tree indicate its age. 树的环形纹理显示其年龄。
The car hit the tree with a sickening crash. 那辆汽车撞在树上发出让人难受的撞击声。
An arrow whizzed past and stuck in a tree. 一支箭“飕”地一声飞过去，钉在一棵树上。
The squirrel ran up a tree and got out of my reach. 松鼠跑到树上去了，我逮不着。
The workers saw off a limb from the tree. 工人从树上锯下了一根大树枝。
He is not made for climbing the tree of knowledge. 他不是生来适于攀登知识之树的。
He tethered his horse to a tree. 他用绳子把马拴在树上。
The ivy twined round the oak tree. 长春藤盘绕着橡树。
She' s too inhibited to laugh at jokes about sex. 她很拘谨; 听到性爱笑话也不笑.
I saw the bird at the very top of the tree. 就在那棵树顶上我看到那只鸟。