T: It depends on the proper handling of intravenous technique and rigid aseptic technique .
T: It depends on the proper handling of intravenous technique and rigid aseptic technique .
老师：这取决于正确的静脉注射操作规程和严格的无菌技术。
T: It depends on the proper handling of intravenous technique and rigid aseptic technique .
老师：这取决于正确的静脉注射操作规程和严格的无菌技术。