back up的詞典解釋是:支持,證實(shí)(某種說(shuō)法)If someone or somethingbacks up a statement, they supply evidence to suggest that it is true。back up的例句是用作不及物動(dòng)詞(vi.)Because congestion prevents ships heading back to pick up new cargoes, it has helped to push prices up further.由于擁堵使船只難以返回運(yùn)載新的貨物,起到了進(jìn)一步推高價(jià)格的作用。back up的讀音是英[b?k?p];美[b?k?p]。