  We present a detailed study of 11 narrow-line Seyfert 1 galaxies (NLS1s) from
the Six-degree Field Galaxy Survey (6dFGS) that both have optical and X-ray
spectroscopic observations. There are five complex NLS1s (C-NLS1s) and six
simple NLS1s (S-NLS1s). We propose a possible correlation between [O III] line
asymmetry and X-ray complexity. The outflow or wind from the inner accretion
disk is commonly present in NLS1s and mostly directed along the system axis. In
C-NLS1s only weak wind effects are measured, the X-ray spectral complexity
might be caused by the presence of ionized material in the wind. On the
contrary, the wind in S-NLS1s is fast, the ionized material could be swept by
such a strong wind, thus the complex feature is missing which results in a
simple X-ray spectrum. Furthermore, this outflow scenario seems to be an
inclination effect. Since the speed of the wind is higher in a small
inclination while lower in a large inclination, S-NLS1s might be sources viewed
at small angles while C-NLS1s might be sources viewed at large angles.
