hold up和 hold down 都有阻碍的意思 有啥区别

hold up1.阻碍They were held up by fog.他们被雾所阻.2.拦截The criminals held up the train.罪犯拦截了火车.3.举出Don't hold me up as a model husband.别把我推举为模范丈夫.hold down1.保有(工作等)Jim has no...