Modification for synthetic purposes on the Diels - Alder adducts 56 and 62 has only rarely been considered.为了达到合成的目的,对Diels-Alder加 成物(56)和(62)加以改造的问题很少有人考虑.The meanders of a prattling brook, were shaded with straggling w...
Some movement in the building will occur as It'settles into the subsoil.楼房沉到下层土时,楼里就会有动静.It'd be fun, after the situation in Europe settles down, to take a trip over to France.等欧洲的局势平定下来后，去法国旅行一趟应该不错。'It&#...