Like a magnet retractor and badge of office to raise the street trick is simple and cheap magician disappear .
就像从一个磁铁和徽章拉钩办公室提出这个简单而便宜的噱头街头魔术师消失的对象。
According to a recent paper in the lancet , published by ian roberts of the john radcliffe hospital , in oxford , it may soon be time to put away the scalpel and retractor clamp , and replace them with the body scanner .