生命科学、自然科学、地球科学的英语文章

natural science
Natural sciences research are organic or inorganic nature of things and phenomena of science. Natural sciences, including astronomy, physics, chemistry, earth science, biology and so on. Math is about the existence of the natural sciences are controversial. Some people think that math is a human sciences, but also someone think math is a branch of philosophy is a logical part of the study. However, math and natural sciences are closely related to the relationship between is indisputable. And natural sciences have different humanities, social sciences and engineering
自然科学
自然科学是研究大自然中有机或无机的事物和现象的科学。自然科学包括天文学、物理学、化学、地球科学、生物学等等。关于数学是否是自然科学存在着争议。有人认为数学是一门人文科学，也有人认为数学是哲学的分支，是逻辑学的一部分。但数学与自然科学之间息息相关的关系是无可争辩的。与自然科学不同的还有人文学、社会科学和工程学

英文：　　　　　　　　　　Ancient Whales Birthed on Land
　　
　　Expectant moms can have very different ideas when it comes to where they plan to have their babies. Some women even choose to give birth in a warm tub of water. But 50 million years ago, whales, it seems, crawled out of the ocean to give birth on land.

　　You’ve probably heard that whales evolved from animals that lived on terra firma. But what were things like during the transition, when early whales spent some time on shore and the rest in the sea? A new report in the journal Public Library of Science ONE offers one idea. Because scientists from the University of Michigan Museums of Natural History recently unearthed the first fossil of an ancient pregnant whale. And they found that the foot-long fetus, who was probably only a day or two from being born, was positioned for a headfirst delivery. That’s how land mammals tend to give birth, so their babies can breathe as soon as they arrive. Modern whales, on the other hand, come out tail-first, to make sure they don’t drown during delivery.

　　So it looks like ancient whales lived in the water but gave birth on the beach. Then they most likely headed back to sea for baby’s first bite of sushi. Which sounds like a whale of a birth plan.

翻译：　　　　　　　　　　　　　很久以前，鲸鱼在陆地产仔
　　说起计划在哪儿生宝宝，即将做妈妈的人会有各种想法。有些甚至会选在温暖的浴盆里分娩。但看来在5千万年前，鲸鱼会从海洋游到陆地上产仔。

你也许已经知道，鲸鱼是从曾经生活在坚实大地上的动物进化而来的。早期的鲸鱼有时在岸上有时回到海里生活，在这个过渡时期情况是怎么样的呢？《公共科学图书馆·综合》期刊上的一项新研究提供了一条新思路。美国密歇根大学自然历史博物馆的科学家最近发掘出了首具怀孕古鲸的化石。他们发现这一英尺来长的胎儿（离出生可能只有一两天）头朝前准备出生。陆地上的哺乳动物往往就是这样产仔的，好让宝宝一出世就能呼吸。而现代鲸鱼则是尾巴先出来，以确保在生产的过程中不会溺水。

因此，古鲸很可能在水里生活，但在岸上产仔。出生后便又回到水里，让鲸鱼宝宝吃上第一口“海鲜寿司”。听起来就像鲸鱼也有自己的生育计划似的。