It was never intended as a substitute for the real thing.它绝非是用来以假乱真的。Carob is used as a substitute for chocolate.角豆粉是巧克力的替代品。Many children will cling to a soft blanket or toy as a substitute for their mother at night.许多小孩子夜里会抱着软软的毛毯或玩具代替他们的母亲。Men fantasise as a substitute for acting out forbidden desires.人类通过幻想宣泄压抑的欲望。