英语翻译If the second variation of the total potential energy has a negative value then a system is unstable.里边的the second variation of the total potential energy 是不是指总势能的二次积分啊?单独查的话是二次变分的意

英语翻译the second most expensive 是 、 the second 是什么用法 英语翻译second 英语翻译If you love two persons,select the second; Because you will not love someone else if you truly love the first.If you love two persons,select the second; Because you will not love someone else if you truly love the first. the second The second the second the second the second the second The Second 英语翻译：：：Peter meets the same woman for the second time 英语翻译( )left.( )the escalator to the second floor. 英语翻译–Second generation(centralized computer control):the individual control tasks canbe carried out by a single computer if the number of intersections is relativelysmall.If several hundreds or thousands of intersections have to be coupled 英语翻译If you love two persons,select the second; Because you will not love someone else if you truly love the first.另外我想知道她到底想选择第一个还是第二个！ 英语翻译if the last four students of the first prize are to be given the second prize,the average score of the students of the second prize will be increased by 1 .and the average score of the students of the prize will be increased by 3.original 英语翻译The damage produced during the thousands of energy producing (ATP) reactions in each cell every second would be devastating to the function,if not the very existence of the cell. Even if this second did not meet the next second will meet.请问这句话的出处,以及意思, 英语翻译A twiceB two C secondD the second