Conclusion: Prenatal diagnosis of fetal gastrointestinal tract anomalies is of instructional clinical value in eugenetics and postnatal treatments.

超声产前诊断胎儿消化道畸形,对优生、优育及出生后早期及时治疗具有重要临床指导价值。

Excavate coal is primary production link in coal mine production, therefor, Weaving excavate coal working face supersedure plan has instructional meaning.

采煤是煤矿生产中的主要生产环节,因而编制采煤工作面接替划对煤矿生产具有指导性意义。