Unit Seven  New Researches in the Field of Immunology
夏洛特烦恼歌曲Text B 
Can We Selectively Shut Off Immune Responses?
1) Immune tolerance is a situation when transplant recipients who stop taking immunosuppressants have not rejected their foreign organs.
2) Mixed chemerism is a state when fraternal twins share a placenta and are born with each other’s read blood cells.
3) The function of T regulatory cells is to prevent specific immune cells from copying themselves and suppress rejection by secreting biochemicals called cytokines that direct the immune orchestra to change its tune.
4) Biomarkers are biological molecules that indicate whether a person has become tolerant to a transplant or not.
Keys: C-D-D-A-B-C
Keys:
1) A lifetime of taking powerful drugs to suppress the immune system, a treatment that can have serious side effects.
2) It is a simile. From it, we can learn there the immune system is a whole part; you can never change a part without affecting the others.
3) This influential experiment led many to devote their careers to transplantation and also raised hopes that the work would lead to cures for autoimmune diseases.
4) One builds on Medawar's experiments by trying to exploit chimerism. A second strategy uses drugs to train T cells to become anergic or commit suicide when they see the foreign antigens on the transplanted tissue. The third approach turns up production of T regulatory cells.
5) The difficulty is that it is maddeningly difficult to judge whether the approach has failed or succeeded because there are no reliable “biomarkers” that indicate whether a person has become tolerant to a transplant.
6) If researchers succeed in exploring the ways to induce immune tolerance, hundreds of thousands of transplant recipients would benefit from it.
Keys:
1) biochemical reactions   
2) the dysfunctional relationship   
我的世界怎么联机3) was transmitted through the placenta     
4) tinker with bank regulation   
5) 金在中绯闻immunosuppressant drugs   
6) a biomarker   
黄雨瑟惠7) fraternal twin sister     
8) occurs in utero   
Keys: e-f-a-c-g      b-d 
Keys:
1) The girl tried to shut herself off from the world.陈十四传奇
邓紫棋失身2) The security men changed their usual routine and collected the money at a different time.
3) There's no formidable obstacles in the world.
4) He fiddled the company's accounts.
5) The legal tangle was never really unravelled.
6) The police had set up a roadblock and waved several drivers down.
7) The optimal state of mind can be fleeting, maddeningly elusive.
8) A messenger was dispatched to take the news to the soldiers at the front.
Keys: 这一发现，Geisler教授继续说，“可帮助我们遏制各种传染病及其在全球蔓延。这对新疫苗的开发特别有用，它能精确地在基于既考虑锻炼我们免疫系统的反应，又考虑在必要时（如器官移植和自体免疫疾病）抑制体内防御能力条件下工作。” 大部份维他命D的产生是依靠皮肤暴露在阳光下天然形成，也可从鱼肝油、蛋、多脂肪鱼(如鲑鱼、鲱鱼、马鲛鱼）或其它膳食补充品。