she must be at least thirty years oldshe must be at least thirty years old.這句話是意思是說she is thirty years old.還是she is over thirty year old.

熱心網友

at least 起碼,最少.她最少三十時了.she is over thirty year old.大于等于三十

熱心網友

she is over thirty year old

熱心網友

后面的那個，因為有個at least表示至少

熱心網友

she is over thirty year old

熱心網友

顯然是后者吧,=30