Pressure of life caused him to crack up.生活的压力使他身体垮了.I kept a straight face as long as I could, but I finally had to crack up.我尽量板着面孔, 但最后还是控制不住失声大笑起来.If you go on working like this, you'll crack up.你要是继续这样干下去, 你的身体会...

Now your phone can help you rack up savings all over town!现在你的手机能帮你在全镇到处省钱了!Rack up directly on the cement foundation, non - embedded I - beam .机架直接放在水泥地基上, 不预埋 工字钢.The home team rack up fifty point in the football game....

rack up的音标：rack up的英式发音音标为：[ræk ʌp]rack up的美式发音音标为：[ræk ʌp]...

在比赛中获（胜），得（分）...

破裂，（体力、精力等）垮掉，夸奖，变干...

crack up的音标：crack up的英式发音音标为：[kræk ʌp]crack up的美式发音音标为：[kræk ʌp]...