1. egg and egg product 
   蛋和蛋制品
2. Add chemicals to tell the egg to start developing into an embryo. Incubate embryo in a test tube for a few days, then implant it into a foster mother. 
   将胚胎放入试管中孵化几日，然后将其植入“养母”体内。
3. No matter how sperm meets egg--whether in a woman's body or in a Petri dish(and even if the sperm needs some help getting inside the egg)--nature is equally vigilant about preventing serious genetic mishaps from coming to term．With those assurances，test－tube births have soared from a few hundred a year in the early 1980s to ten s of thousands today． 
   无论精子如何与卵子结合--是否在女人体内还是在较硬的试管壁上，(即使精子需外力帮助才与卵子结合)，大自然都同样会阻止严重变形的基因分娩，有了这样的允诺和保证，试管婴儿的出生在２０世纪８０年代早期由每年的百余例上升到现如今的数万例。
4. electronic tube parameter measurement 
   电子管电参数测量
5. phototube and photomultiplier tube 
   光电管与光电倍增管

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