Definition
Used to emphasize a negative statement, indicating that something is even less likely or possible.
更不用說
He has trouble even walking, much less running.
他連走路都有困難，更不用說跑步了。
She has never traveled abroad, much less gone on an adventure.
她從未出國旅行過，更不用說去冒險了。
This child can’t even recognize letters, much less read a book.
這個孩子連字母都認不出來，更不用說讀一本書了。