But,by this time,limited by the technology,all of the marine seismic devices of our country were bought from fremdness which were very costliness and mantained discommodiousness.

• 但是，一直到现在，由于技术发展的落后，我国海洋石油勘探设备一直都是从国外进口，价格昂贵，维修很不方便。