机译:Orbits of nearby planetary nebulae and their interaction with the interstellar medium
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Beijing 100012, China;
College of Physical Sciences, Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;
planetary nebulae: general; planetary nebulae: individual (Sh 2-216; PuWe 1; A21; Ton 320; A31; PG 1034 + 001; NGC 7293; DeHt 5); white dwarfs;