眼睛是人体最娇贵的器官之一。
它们是由人体产生的。
这水平并不对人体健康构成立即的威胁。
The levels do not pose any immediate danger to human health.
我的主要任务是分析人体排泄物。
除非你对狼蛛毒素过敏，否则它们对人体是无害的（尽管它们咬你一口会很痛）。
Unless you are allergic to tarantula venom, they are harmless to humans (though they pack a painful bite).
人体也需要这样的平衡。
本周生物学的主题是人体。
“众所周知，人体机能损伤是会累积的。”他补充道。
"It was always known that the body accumulates damage," he added.
但是他们只是驶过，把人体交通标志看作理所当然的事。
But they just pass by, taking the human traffic signal for granted.
玉米中含有维生素烟酸，但不以人体可吸收的形式存在。
Maize contains the vitamin niacin, but not in a form the body can absorb.
中国医生相信他们可以通过这种方式控制人体的自然力量。
Chinese doctors believe that they can control the body's natural forces in this way.
由于苯酚对人体有刺激性作用，它基本上已不再被当作常用的防腐剂了。
Because of its irritating effect on humans, the use of phenol as a general antiseptic has been largely discontinued.
他们封锁道路，负责架设长达25英里的人体屏障，并在一个广阔的区域内实施停车管制令。
They blocked roads, set up 25-mile human barriers, and enforced parking control orders over a wide area.
人体是一台能提出许多有趣问题的机器。
The human body is a machine that can raise lots of interesting questions.
饱和脂肪被人体用来制造胆固醇，而高浓度的胆固醇与心脏病直接相关。
Saturated fats are used by the body to make cholesterol, and high levels of cholesterol have since been directly related to heart disease.
饱和脂肪被人体用来制造胆固醇，而高水平的胆固醇自此与心脏病直接相关。
Saturated fats are used by the body to make cholesterol, and high levels of cholesterol has since been directly related to heart disease.
为了使一种化学物质被认为是一种药物，它必须具有影响人体运作的能力。
In order for a chemical to be considered a drug, it must have the capacity to affect how the body works.
这样的一种物质是如何对人体产生影响的呢？
快乐对人体的益处可能并不像研究人员认为的那样多。
Happiness may not be as good for the body as researchers thought.
他解释说，人体的编程是在日出时开始一天的工作。随着白天变短，这一过程会变晚。
The body is programmed to start the day with sunrise, he explains, and this gets later as the days get shorter.
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。
Scientists have obtained more evidence that plastic is finding its way into the human body.
多亏有了光纤，如今才能够照见人体中许多最微小的器官和最暗的腔体。
Thanks to fibre optics, it is now possible to illuminate many of the body's remotest organs and darkest orifices.
受感染的蚊子叮人时，孢子就被注入人体血液。
When an infected mosquito bites a human, spores are injected into the blood.
赞德拉是位36岁却有着21岁人体格的运动型人。
Xandra is an athletic 36-year-old with a 21-year-old's body.
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。
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.
我们的研究表明，这与改变人体内部的生物钟有关。
Our research suggests it has something to do with shifting the body's internal clock.
关于社区成员之间饮食变化的信息是通过分析人体骨骼中的微量元素得到的。
Information about dietary variation among community members is derived by analyzing trace elements in human bone.
在人体内，你的下巴相对于屁股距离你的舌头更近；而在运动皮层与感觉皮层上的位置关系也是如此。
Your tongue is closer to your jaw than it is to your hip in the body; so too in both the motor cortex and the somatosensory cortex.
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。
Classical Greek statues represented an idealization of the human body and were considered quite beautiful at the time.
限制人体体能表现的因素之一是肌肉从血液中吸收的氧气量。
One of the limiting factors in human physical performance is the amount of oxygen that is absorbed by the muscles from the bloodstream.
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