邮费最低收费为5英镑。

There is a ___minimum charge of £5 for postage.

18岁是进入大多数夜总会的最低年龄。

Eighteen is the ___minimum age for entering most nightclubs.

那是大多数语言学校教授英语所需的最低资格。

That's the ___minimum qualification required to teach English in most language schools.