Antibodies are produced by the immune system when something foreign, such as viruses or chemicals, invades the body . 抗体是免疫系统在异物（例如病毒或一些化学物质）侵犯机体时所产生的。
In an effort to discover whether the foreign matter was tuberculous he then injected some of the mold into a rabbit . 为了要知道那异物是不是结核性的，他又把霉液在一个兔子身上注射了一些。
The spiracles are guarded by bristles which aid in filtering dust and other foreign matter from the air before it enters the tracheae . 气门由刚毛保护，这种叫毛在空气进入气门以前，帮助过滤空气中的灰尘和其他异物。
Urinary stone and foreign object extractor and forceps 尿道结石和异物取出器及镊子
The oculist removed a foreign object from his eye 眼科医生从他眼中除去一个异物。
The foreign body can be shown up on a barium swallow 吃了钡之后能把异物显示出来。
A cut by a sharp object such as knife -例子：被生果刀割伤,通常没有异物。
A if the foreign bodies are not embedded in the eyeball 甲如异物并非嵌入眼球内，则：
Such foreign material can produce a granulomatous reaction 这样的异物可促使肉芽肿形成。
There is a foreign body granulomatous response 可见异物肉芽肿性反应。
