ersatz

adj.代用的；假的

n.代用品

In the 16 months since the first graft, the ersatz skin has not yet been rejected by any of the patients. 第一次植皮后的16个月中，人造皮肤在每个病人身上都还没有排斥现象。

Instead of first-hand experiences and real interation, they have ersatz experiences on screens. 他们没有亲身体验的经历和互动，只有来自各种屏幕的虚假经历。

There is a flourishing trade in ersatz ginseng. 人参代用品的买卖很兴