Selectivity of human migration long been the focus of demographers and economists.人口迁移的选择性一直以来都是人口学家和经济学家关注的焦点.In the public's eyes , demographers have a checkered reputation.民众对人口统计学者的评价不一.Demographers talk about a...
Certain proteins help copy nucleic acids by fashioning complementary strands that carry matching nucleotides.Proteins携带配对的nucleotide参与了nucleicacids的 精确配对复制是明确的.Deoxyribose A pentose ( five - carbon ) sugar that is a comp...
They were accurate in their prediction that he would change her life drastically.他们预测得没错，他使她的生活发生了翻天覆地的变化。Next year’s budget will have to be drastically pruned.下一年度的预算将大幅度削减。We have managed to cut our costs quite drastic...