题目内容：

must not 和need not 谁的力度大?
请细致点,

优质解答

must not禁止,不能
need not 不许,没必要
所以禁止力度大
例：他没必要吃那么多肉
He did not need to eat so much meat
他不能再吃肉了.
He must not eat meat any more