例句與造句

1. An artificial reef structure rings the building perimeter, consisting of a series of concrete steps.
2. Highly structured ring spectra have better formal properties than multiplicative cohomology theories-a point utilized, for example, in the construction of topological modular forms, and which has allowed also new constructions of more classical objects such as Morava K-theory.
3. A graded commutative C ^ \ infty ( Z )-algebra is isomorphic to the structure ring of a graded manifold with a body Z if and only if it is the exterior algebra of some projective C ^ \ infty ( Z )-module of finite rank.
4. The rough idea of highly structured ring spectra is the following : If multiplication in a cohomology theory ( analogous to the multiplication in singular cohomology, inducing the cup product ) fulfills associativity ( and commutativity ) only up to homotopy, this is too lax for many constructions ( e . g . for model categories.
5. It's difficult to find structure ring in a sentence. 用structure ring造句挺難的