'It's jam tomorrow and jam yesterday-but never jam today.'
只是明天或昨天有果酱--今天决没有果酱。”
英语百科
Jam tomorrow
Jam tomorrow or (older spelling) jam to-morrow is an expression for a never-fulfilled promise. It originates from Lewis Carroll's 1871 book Through the Looking Glass and What Alice Found There. In the book the White Queen offers Alice "jam every other day" as an inducement to work for her: