生产定额, 预算约束等等可以限制变量的变化范围.Production quotas, budget constraints, etc. might restrict the variation of the variables.我们得将水按定额配给.We'll have to ration out the water.因此, 我们将购买一种比如说价值五万美元的不定额综合险.So, we'll take out an ...
There's always tons of scrap paper in Dad's office.爸爸的办公室里总有大量的废纸。"They play classic rock'n"roll,' states her boyfriend, "My dad digs them too."“他们演奏经典摇滚乐，”她的男朋友说道，“我爸爸也喜欢他们。”Dad spoils me. He loves m...
箭头指向卫生间。An arrow pointed to the toilets.箭头射入他的肩膀。The arrow pierced his shoulder.用箭头键把文件目录滚动一遍。Use the arrow keys to scroll through the list of files....