up against the wall 碰壁...up and about (病后)起床走动...up and doing 积极肯干的,忙碌的...up and down 上下地,到处...up arrow 向上箭头键向上箭头键...up chain 上行链...up counter 加法计数器...up data link 上行数据链路...up for 在选举中被提名供考虑,在法庭受...up front 在最前面,预先...up hill and down dale 翻山越谷,拚命地,彻底地...up in 熟悉,精通...up in arms 进行武装斗争,竭力反对...up in the air 悬而未决...up keep cost 维护费;维护费用...up on 熟悉,精通...up one's street 属于自己的兴趣或活动范围...up path 上行路径...up run 上行...up sb.'s alley 合某人胃口的...up symbol 升符号...
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