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...
这可能是以鱼易菜, 也可能是以肉换粮.Perhaps it is fish for vegetables, or meat for grain.康沃尔馅饼 ( 以肉和菜为馅做成的小点心 ).Cornish pasty ( small pie consisting of pastry filled with meat and vegetables )配菜广泛使用大米, 配以肉 、 牡蛎 、 乌贼、田鸡 、 蘑菇等.Extensive us...
I wrote him a letter and posted it straightaway.我给他写了封信，并马上寄了出去。Straightaway our worst fears were realised.我们最恐惧的事情一下发生了。I'll ask them to send someone out straightaway to fix the car.我会请他们马上派人修理汽车的....
We have nothing against diversity; indeed, we want more of it.我们一点都不抵触多样化；实际上，我们需要多样性更丰富一些。Conservationists are mostly wedded to preserving diversity in nature.自然环境保护主义者大多致力于保持物种的多样性。Two of our greatest strengths are div...