tag-and-exchange strategy

...(hit and runstrategy)、标记—交换(tag and exchange strategy)和Cre—10tP重组系统(Cre—Lot P recombina-tion system)等新 …

...就走（hit and run strategy），标记交换（tag and exchange strategy）和Cre-loxP重组系统等新的基因转移策略。