这是一篇选自英国《经济学家》杂志的科技类文章。文章分两部分:前一部分讲美国科学家认为目前在英美等国出现的男婴出生率下降现象与单身母亲的增加有关系,因为她们更有可能生女孩;后一部分则根据美国科学家的研究结果来解释为什么单身母亲会更容易生女孩。作者在文章结尾处表达了自己的不同意见。为什么单身母亲会更容易生女孩呢?是性行为所致?是进化导致的结果?还是其他原因?你会在本文中得到答案,你还会知道为什么你是个女的或是男的。也许,即使知道了你也不相信。像一般科普文章一样,该文语言简洁明了,特别表现在句式结构上,但专业词汇较多,注释中将会着重讲解。 This is a science and technology article from the British “Economist” magazine. The article is divided into two parts: The first part states that American scientists believe that the current decline in the birth rate of male babies in countries such as Britain and the United States is related to the increase in single mothers because they are more likely to have girls; the latter part is based on the findings of American scientists. Why single mothers are more likely to have girls. The author expressed his disagreement at the end of the article. Why would a single mother be more likely to have a girl? Is it due to sexual activity? Evolutionary results? Or other reasons? You will get an answer in this article. You will also know why you are a woman or a man. Maybe, even if you know it, you don’t believe it. Like ordinary science articles, the language of this article is concise and clear, especially in the sentence structure, but there are more professional vocabulary and explanations will be emphasized.