The central notion in commutative algebra is that of a prime ideal.交换代数中最核心的概念就是素理想.It'should be clear that vector addition is commutative.可清楚地看0剑0矢量加法满足对易律.The groups of the solvable equations are commutative.可解方程的...
We walked to the furthermost point and then sat on the sand dunes.我们走到了最远处，然后坐在了沙丘上。She believed she would die in the snake-infested sand dunes. She said: 'It was hell on earth'.她觉得自己会死在遍地毒蛇的沙丘中。她说：“这简直是人间地狱。”A...
在诗歌中，人生被比喻为朝露。Life is poetically compared to the morning dew.“ 人生如朝露!" Life is like the morning dew!这些年轻人 —— 对于他们来说,人生只是朝露和及时行乐.These youngsters - it's all a short life and a merry one with them....
The Public Utilities Commission inspects us once a year.公共事业委员会每年到我们这里视察一次。The dentist inspects the children's teeth twice a year.牙科医生每年给孩子们检查两次牙.When he inspects he brings a needle, probes the cracks on the stairs ...