三番五次: again and againfor a thousand timestime and again
三番五次向她借钱: he takes advantage of her kindness and borrows money too often
告诫: warn; admonish; enjoin; counsel; dissuade from; exhort 短语和例子告诫某人要 ... exhort sb. to...; 诚挚的告诫 an earnest warning; 医生告诫病人不要抽烟。 the doctor warned the patient against smoking