Although bullfrogs were introduced into mainland China in 1959, they were not wildly raised until 1990.1959年牛蛙被引入中国大陆, 但直到1990年才开始在国内大范围饲养.Some of it can be credited to mainland corporations borrowing more overseas.其中一些可...
Johnson's easy charm contrasted sharply with the prickliness of his boss.约翰逊的亲和力和他老板易怒的性格形成了鲜明的对比。But whatever prickliness the Indians may have with the US, conversation has never been a problem.然而,不管印美关系多么棘手, 双方之间的...
溶液和熔体的粘度等性能曲线并不呈现平坦.Among the properties which do not show a leveling - off are the viscosities of solutions and melts.探讨了PET酯 化、聚合生产过程对熔体直接纺丝的影响.The effect of PET production on melt direct - spinning is discussed.用熔体发泡法...