任何对身体有害的外来物或生物。
它大概对你的经历来说是外来物。
但是外来物能变成土生土长的吗？
我们的细胞不喜欢外来物。
胎儿的另一半基因是来自父亲的外来物。
Half the fetus' s genes are foreign material, coming from the father.
甚至组织型相配，人体仍然把新心脏当做外来物对待。
Even with a similar tissue match, the body still treats the new heart as a foreign substance.
如果外来物进入厕所或厨房的排放系统则会引起堵塞。
A blockage in the lavatory or the galley drain is possible if unwanted materials get in the system.
而对于违规上阵的球员——将被当作是一个“外来物”——要求他离开球场。
Instruct the illegal sub - considered an outside agent - to leave the field of play.
而且，接受者的机体将视移植来的器官为外来物，这将导致以排除器官为目的的一连串的免疫反应。
In addition, the recipient's body must not view the organ as foreign, which could result in a dangerous cascade of immune responses in order to expel it.
过了这段时间，任何外来物被视为危险的，除非免疫系统被专门告知忽视这些细胞和蛋白质。
After this time, anything foreign is deemed as dangerous, unless the immune system is specifically told to ignore those cells and proteins.
根据对比试验原理，分析了外来物损伤对叶片疲劳寿命的影响，提出了损伤叶片的允修范围。
The fatigue test of the damaged blades and repaired blades have been carried out respectively. According to the data, the repair scale of FOD blades was proposed.
这种星际鱼状物巧妙地解决了每个科幻小说作家都面临的一个问题：如何让外来物种彼此交流。
This interstellar ichthyoid neatly disposed of a problem all science-fiction authors have: how to let alien species talk to one another.
首先对叶片进气边分区进行了模拟外来物损伤试验，并对外伤叶片和损伤后的修理叶片分别进行了疲劳试验。
Firstly, simulated . experiments of FOD on the leading edge of the blade were performed. Then, the damaged blades were fatigue tested.
这些动物依靠外来饲料、能源和其它投入物的供应。
They depend on external supplies of feed, energy and other inputs.
人类身体携带有几百种细菌物种，这些细菌负责各种有益健康的例行工作，从帮助消化到帮助免疫系统确认外来入侵物。
The human body hosts hundreds of bacterial species that perform various salubrious housekeeping chores, from aiding digestion to helping the immune system identify foreign invaders.
如果你断定飞进来的皮球是一个“外来干扰物”的话，你应该中断比赛，并在中断时皮球所在的位置以“坠球”的方式重新开始比赛。
If you consider the ball to be an 'outside interference', play should be stopped and the game restarted with a drop ball.
在那幢房子隐秘的中心，在客人们看不着的地方，它们躺在那儿，就像一个微小的提示物，让人想起以弗鲁西斯家族自身无法缩减至无形的外来者身份。
There in the intimate heart of the house, shielded from visitors, they lay like a tiny reminder of the Ephrussis' own irreducible nub of outsiderness.
不是所有的不明飞行物都是天外来客。
我总是很开朗的可能性不明飞行物和外来存在。
I was always very open minded to the possibility of UFO and alien existence.
就和大多数较明显的外来飞行物目击事件一样，拍摄的视频和图像都不清晰，飞行物的形状和大小也难以辨认。
As with most apparent alien craft sightings, the quality of the footage and picture is poor, and the shape or size of the object is difficult to work out.
一些外来的干扰物，例如你的手机、电视都会影响你的学习，就像一些内在的干扰物，例如忧虑或愤怒也会达到一样的效果。
External distractions like your phone and the TV can ruin your study sessions just as internal distractions like worry and anger can do the same thing.
一些石化的骨头的所有裂缝的空隙，包括骨髓空腔，都充满了外来的矿石，如果这儿还有有一个空腔当其他的空腔都已被占据，填充物很少是来源于他们的环境。
Some fossil bones have all theinterstitial spaces filled with foreign minerals, including the marrowcavity, if there is one, while others have taken up but little fromtheirsurroundings.
一些石化的骨头的所有裂缝的空隙，包括骨髓空腔，都充满了外来的矿石，如果这儿还有有一个空腔当其他的空腔都已被占据，填充物很少是来源于他们的环境。
Some fossil bones have all theinterstitial spaces filled with foreign minerals, including the marrowcavity, if there is one, while others have taken up but little fromtheirsurroundings.
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