They are produced by the human body.
它们是由人体产生的。
Water is important to the human body.
水对人体很重要。
How low gravity affects the human body.
低重力如何影响人体。
The human body needs such a balance, too.
人体也需要这样的平衡。
Doctors study the structure of the human body.
医生研究人体构造。
In biology this week, the topic is Human Body.
本周生物学的主题是人体。
Scientists have obtained more evidence that plastic is finding its way into the human body.
科学家们已经获得了更多的证据来证明塑料正在进入人体内。
Thousands or even millions of tiny machines can be sent into the human body with specific tasks.
成千上万甚至上百万的微型机器可被送入人体执行特定的任务。
The human body is influenced by natural chemicals that produce "a sense of happiness", noted BBC News.
BBC 新闻指出，人体会受到能产生“幸福感”的天然化学物质的影响。
Now hair, whatever it is for and wherever it is on the human body, is composed mainly of a protein called keratin.
不管毛发是用来做什么的，也不管它在人体的哪个部位，它都主要由一种叫做角蛋白的蛋白质组成。
Classical Greek statues represented an idealization of the human body and were considered quite beautiful at the time.
古典希腊雕像代表了理想化的人体，这在当时被认为是相当美丽的。
Best of all, bananas provide different things that the human body needs! Bananas grow best in warm places that get lots of rain.
最重要的是，香蕉能提供人体所需的不同东西！香蕉在温暖多雨的地方生长得最好。
The human body can absorb no more than about a quart of water per hour, beyond which the brain can swell dangerously, says Dr. Goldfarb.
戈德法布博士称，人体每小时最多只能吸收大约一夸脱水，如果超过这个限度，大脑就会危险地膨胀。
For example, doctors did not have devices allowing them to go inside the human body to detect health problems or to perform delicate surgery.
例如，医生没有能够进入人体内检测健康问题或进行精细外科手术的设备。
In the cells of the human body itself, in the cells of every organ, of almost every type of tissue in the body, the same thing will happen eventually.
在人体自身的细胞中、在每个器官的细胞中、在人体几乎每一种组织中，同样的事情最终都会发生。
The human body doesn't discriminate between a big stressful event and a little one.
人类的身体不会区分大压力事件和小压力事件。
The book focuses on six sections including zoology, the human body and botanics.
该书的主要内容包括生态、人体和植物等六大部分。
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