Any foreign body that comes into your body could be an antigen.

进入你体内的任何异物都可能是抗原。

But they had enough similarities to make it equally unlikely that the moon was a completely foreign body.

但两者间的相似性又让人觉得月球不可能和地球毫无瓜葛。

Those chemical markers can identify foreign bodies like pathogens-small organisms, such as a virus or bacteria, that can cause disease.

那些化学标记能够识别外来物，例如病原体——能够引发疾病的小型有机物，例如病毒或细菌。

Those chemical markers can identify foreign bodies like pathogens - small organisms, such a virus or bacteria, that can cause disease.

那些化学标记可以识别异物，如病原体——诸如病毒或细菌等可能导致疾病的小型生物体。

Antigens serve as identifying markers, allowing the immune system to recognize your body's own cells without attacking them as foreign bodies.

抗原充当着识别标记者的身份，它让免疫系统识别出你体内自己的细胞而不会将它们当作外来的物质进行攻击。

They can also be cytotoxic, meaning that they will kill cells of said foreign body.

T细胞们也会产生细胞毒性(Cytotoxic)，将前述的外来细胞消灭。

Your body also has you unconsciously blink to keep your eyes moistened and help prevent foreign bodies from coming into your eyes.

你的身体也会不自觉地眨眼，以保持眼睛湿润，并有助于防止异物进入你的眼睛。

The scientists then wrapped the thylakoids with the cover of animal cells, which made the implanted thylakoids more acceptable to foreign bodies.

再用动物自身的细胞膜来包裹类囊体，借助这层伪装，让植入的类囊体更容易为相异的细胞所接受。

The researchers encapsulated the light-powered structure in a nanosized animal cell membrane coating as of camouflage to prevent the rodent's immune system from rejecting it as a foreign body.

研究人员将光能结构封装在一个纳米级的动物细胞膜涂层中，作为一种伪装，以防止啮齿动物的免疫系统将其作为异物排斥。

However, bone marrow transplants are a complicated process requiring antigen compatibility between the donor and recipient to keep the transplanted cells from from attacking the patient's own cells as foreign bodies.

然而，骨髓移植的过程很复杂，它要求捐献者和患者间的抗原能够匹配，这样才能防治移植的细胞攻击患者自身细胞。

Air enters the body through the nose and passes through the nasal cavity, which is lined with a mucous embrane and fine hairs (cilia) to help filter out foreign bodies, as well as to warm and moisten the air.

空气通过鼻子进入身体并通过鼻腔，鼻腔内衬有粘膜和细毛（纤毛），以帮助滤掉异物，保持进入空气的温暖和湿润。