只有精密的X射线仪器才能显示出来。It will only register on sophisticated X-ray equipment.这是一台非常精密的机器.This is a very sophisticated machine.克莱斯勒公司在密执安的工程师设计出了世界上最精密的油箱.Chrysler engineers in Michigan had designed the world's most sophi...
Andy Canvin is a pioneer on the strange frontier of DNA genealogy.安迪-卡文是DNA谱系学奇异前沿的先锋人物.He had sat and repeated his family's genealogy to her, twenty minutes of nonstop names.他坐下又给她细数了一遍他家族的家谱，20分钟内说出了一连串的名字。He was ...